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Title: Bob Cook and the German Spy

Author: Paul Green Tomlinson

Posting Date: November 5, 2011 [EBook #9899]
Release Date: February, 2006
First Posted: October 29, 2003

Language: English

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BOB COOK AND THE GERMAN SPY

BY PAUL G. TOMLINSON


Author of "To the Land of the Caribou," "The Trail of Black Hawk," etc.




PREFACE


Every one knows that Germany is famous for her spy system. Scarcely a
land on earth but is, or was, honeycombed with the secret agents of the
German Government. Ever since this country began to send war munitions to
the Allies an organized band of men has plotted and schemed against the
peace and welfare of the United States. When America itself declared war
their efforts naturally were redoubled. Our Secret Service has been
wonderfully efficient, but it has not been humanly possible to apprehend
every spy and plotter at once. It is a big task to unravel all the
secrets of this great German organization.

We are at war with Germany now and it is the duty of every American to
help his government in every way he can. This book is the story of how
two boys, too young to enlist, did "their bit" right in their own home
town. It is not an exaggerated tale, but presents in story form what has
actually happened all around us. Due allowance is made for the fact that
the most of our citizens of German birth and descent are good Americans.
No one whose motto is, "America First," need fear offense from anything
contained in the story of "Bob Cook and The German Spy." Two boys loved
their country and did their duty by it. May we all do as well.

PAUL G TOMLINSON.

Elizabeth, N. J.




CONTENTS


CHAPTER


     I WAR IS DECLARED
    II THE SECRET SERVICE AT WORK
   III BOB HAS A FIGHT
    IV HEINRICH AND PERCY
     V ON THE BRIDGE
    VI HUGH HAS AN IDEA
   VII IN THE NIGHT
  VIII A STRANGE OCCURRENCE
    IX ANOTHER SURPRISE
     X BOB IS MYSTIFIED
    XI THE DESERTED HOUSE
   XII TRAPPED
  XIII MISTAKEN IDENTITY
   XIV AN EXPEDITION
    XV FIRE
   XVI MORE COMPLICATIONS
  XVII A MESSAGE
 XVIII KARL HOFFMANN
   XIX A DISCUSSION
    XX ANOTHER SUSPECT
   XXI ON THE STREET
  XXII BOB ACTS QUICKLY
 XXIII UNDER THE LIGHT
  XXIV AT THE FACTORY
   XXV A STRUGGLE IN THE DARK
  XXVI AN EXPEDITION IS PLANNED
 XXVII A RAID AND A SURPRISE
XXVIII CONCLUSION




BOB COOK AND THE GERMAN SPY




CHAPTER I

WAR IS DECLARED


"Well," said Mr. Cook, "I see that the United States has declared war on
Germany. I am glad of it, too."

"Why, Robert!" exclaimed Mrs. Cook. "How can you say such a thing? Just
think of all the fine young American boys who may be killed."

"I realize all that," said her husband. "At the same time I agree with
President Wilson that the German Government has gone mad, and as a
civilized nation it is our duty to defend civilization. The only way left
for us is to go in and give Germany a good beating."

"And I shall enlist and get a commission," cried Harold, their eldest
boy. "I am twenty-three years old. I have been at Plattsburg two summers,
and I have done a lot of studying; I know I can pass the examinations."

"What will you be if you do pass?" inquired his father. "A lieutenant?"

"Well," said Harold, "a second-lieutenant."

"I wish I could enlist," sighed Bob.

"Huh!" snorted his older brother. "You can't enlist. What military
training have you had? And besides, you're only seventeen; they wouldn't
take you."

The Cook family were seated at the dinner table, mother, father, and
three children, the two boys referred to above and a young daughter,
Louise, just thirteen years of age. Congress had that day declared war on
Germany, and naturally that was the one thing in every one's mind. Crowds
in front of the newspaper offices had greeted the news from Washington
with wild enthusiasm, patriotic parades had been organized, and from
almost every house and office streamed the Stars and Stripes.

Bob Cook had been among the crowds, and his young mind and heart were
fired with patriotism and enthusiasm. A company of soldiers from the
Thirty-ninth Infantry called out the week before had caused him to
cheer and hurl his cap high in the air, while all the time he envied
the men in khaki.

"I hate to think of you enlisting, Harold," said Mrs. Cook sadly.

"Why?" demanded Harold earnestly. "Don't you think it is my duty to
offer my services to my country! I'm free; no one is dependent upon me."

"I know," agreed his mother, "but somehow I don't like to have my boy go
over to France and be killed. Let some one else go."

"Suppose every one said that," exclaimed Harold. "We shouldn't have much
of an army and our country wouldn't be very well defended, would it?"

"Let him go," said Mr. Cook quietly to his wife. "I don't want him killed
any more than you do, but there are some things worse than that. Suppose
he was afraid to go; you'd be ashamed of your son then I know."

"How do you know I'm going to get killed anyway?" demanded Harold. "Every
one that goes to war doesn't get killed. At any rate it's sort of
gruesome to sit up and hear your family talk as if you were just as good
as dead already."

"True enough," laughed Mr. Cook. "When does your examination come?"

"Next Monday."

"Will you wear a uniform?" asked Louise.

"Why, certainly," said Harold, swelling out his chest at the thought.

"I wish I could enlist," sighed Bob.

"You're too young, I told you," said Harold scornfully.

"I'll bet I could fight as well as you could," said Bob stoutly.
"Besides, I'm big for my age and maybe if I told them I was older than I
really am they might take me."

"Don't do that, Bob," said his father earnestly. "Don't lie about it."

"They'd find you out anyway," exclaimed Harold. "You can't fool these
recruiting officers."

"I'd like to get to France and see the trenches, and see the soldiers,
and the guns, and the fighting," Bob insisted.

"Do you realize that Harold may never get to France even if he does
enlist and get a commission?" remarked Mr. Cook.

"Why not?"

"First of all on account of Mexico."

"Do you think the Mexicans will make trouble?" inquired Harold.

"I shouldn't be at all surprised," said Mr. Cook. "If they think we have
our hands full with Germany those bandits may stir up a fuss and then
troops would have to be sent down there."

"And Harold might be one of them," laughed Bob. "That would be a joke,
wouldn't it?"

"I don't see why," cried Harold warmly. "If troops were needed in Mexico
and I was one of those sent, I'd be serving my country just the same."

"Of course you would," his father agreed. "It might be though that you
wouldn't even get out of High Ridge."

"You think they'd keep us right here?" demanded Harold, his face falling.

"Possibly," said Mr. Cook. "It might be that you'd have your hands
full too."

"Do you think the Germans could land an army and invade this country?"
exclaimed Mrs. Cook in alarm.

"Not for a minute do I think that," said Mr. Cook.

"Then what do you mean?"

"Aren't there lots of Germans in the country already?"

"Do you think they'd make trouble?"

"Most of them would be peaceable enough, but some of them would only be
too glad to blow up some factories, or railroads, or things like that."

"They've been doing that for the last two years," said Harold, "but I
don't see what there is in High Ridge."

"There's my company," said Mr. Cook. He was president of the High Ridge
Steel Company.

"But you don't make war supplies," exclaimed Mrs. Cook. "Why should they
want to blow up your plant?"

"Up until now we haven't manufactured war supplies," Mr. Cook corrected.
"This afternoon, however, we took a contract from the Government to make
high explosive shells. And, what is more, we are going to do it at cost
price so we shan't make a cent out of it."

"I think that's fine," said Bob enthusiastically. "Perhaps you'll have to
stay home and guard father's factory, Harold."

"Do you think there'll be any danger to it?" Harold asked his father.

"I don't know," replied Mr. Cook. "There are a lot of rabid Germans in
High Ridge and you can't be sure just what they will do."

The telephone rang at that moment and Bob excused himself to go into the
next room and answer it. Dinner was now over and the rest of his family
shortly followed. As they entered the sitting-room where the telephone
was located, Bob was in the act of hanging up the receiver.

"Who was it, Bob?" asked his mother.

"I don't know; it sounded like a German's voice. At any rate he had the
wrong number. He said, 'Iss dis Mr. Vernberg?'"

"Oh, Wernberg," exclaimed Mr. Cook. "He's the man who moved into that
house down on the corner about two years ago. Karl Wernberg is his full
name and he's one of the worst of the Germans; he used to be an officer
in the German army, I understand."

"What do you mean 'he's one of the worst of the Germans'?" asked Harold.

"Why, the way he talks against the United States and for Germany. He's
made all his money here, too."

"What's his business?"

"Some kind of chemicals, I believe."

"Perhaps he's making bombs," laughed Harold, and the rest of the family
joined in the laugh. That is, all but Bob, who took the suggestion
seriously, and his heart thumped a beat faster at the thought.

In fact, as he went to bed that night his mind was filled with thoughts
of spies, and plotters, and the hundred and one other things connected
with the war that he and his family had discussed that evening. He went
to the closet and took out the .22 caliber rifle that he owned; it was
in good condition and Bob assured himself that he had plenty of
cartridges, though he knew so small a gun would be of but little use in
time of trouble.

As he undressed he thought over the events of the day. Never had he
experienced such excitement. War had been declared, and many of the young
men, not much older than he, had enlisted. He, too, wanted to go in the
worst way, but he knew that his father and brother were right when they
said he would not be accepted.

"Why not?" muttered Bob to himself. "I'm big enough and strong enough
too; I could stand it as well as most of those fellows, even if they are
older. Besides I weigh a hundred and fifty-three and I'm five feet nine
inches tall. Perhaps they won't take me because I've got light hair and
blue eyes," he murmured bitterly. "They think I look like a German."

Stripped to the skin he stood in front of the mirror and looked at
himself. Certainly he was big and strong. He had always lived a clean,
outdoor life, he had been active in athletics and right now was captain
of the high school baseball team. The muscles played and rippled under
his white skin, as he moved his lithe young body to and fro.

A few breathing exercises before he jumped into bed, and then he was
under the covers. And all night long he dreamed of chasing big fat
Germans up and down the streets, over fences, and across fields, and even
up the steep sides of houses. Usually just as he had caught up with them
he awoke. Most of all he dreamed he was pursuing Karl Wernberg, who was a
middle-aged German and not hard to overtake. But Bob did not catch him
because he always woke up too soon.




CHAPTER II

THE SECRET SERVICE AT WORK


The following morning Bob was in the trolley car on his way to school.
The car was full, and every one was eagerly scanning a newspaper or
discussing the war with his neighbor. Words of praise for the President
were to be heard on all sides, and enthusiasm was everywhere in evidence.
Old men wished they were young enough to enlist.

All at once Bob heard voices raised in dispute. The trouble was at the
opposite end of the car, but he could hear plainly what was said.

"It is wrong, all wrong," exclaimed a florid-faced man with a light
mustache, who plainly was of German blood. "What has Germany done to
this country?"

"They've sunk our ships when they had no right to, and they've murdered
our peaceful citizens," said the man next to him. "Isn't that enough?"

"They were forced to do it," the German insisted.

"Oh, no, they weren't," said his neighbor calmly. "Any one can play the
game according to the rules if he wants to; there is never any excuse
for dirty work."

"Germany wants peace with the United States," said the German loudly.

"Well, if they do, they take a strange method of showing it," replied the
other man with a grim smile. "Personally it's my opinion that we've been
patient with Germany far too long. Now they've forced war upon us and for
my part I'm ready to go out and fight for my country."

Every one in the car was now listening to the discussion, and perhaps the
most interested listener of all was young Robert Cook.

"Well, I won't fight for the United States!" exclaimed the big German,
rising to his feet. "I won't fight for Germany either, but I'll fight all
right." He started toward the door of the car, while Bob pondered over
his last remark and wondered what it could mean.

As the German approached the door, a man dressed in a neat black suit and
soft hat got up out of his seat. Bob was watching the German and also
noticed this man, though not particularly; he did see that he had a
square jaw and a determined look in his gray eyes.

The German started to crowd past the stranger who stood squarely in the
aisle. "Don't be in such a hurry," said the man quietly. "You stay here."

"I want to get off this car," shouted the German angrily. "Get out
of my way."

"I want you to come with me," said the man still in the same quiet tone.
As the German started to protest once more he drew back his coat slightly
and Bob saw the gleam of a badge on his coat. "Sit down," he said to the
German, who obeyed without further question.

There was a mild flurry of excitement in the car, and there were smiles
of amusement on the faces of many of the passengers as they glanced at
the German sitting meekly in the corner of the seat. He seemed entirely
cowed now, and kept his eyes fixed upon the floor, save for an occasional
look he stole at the secret service man standing in front of him. The
latter seemed entirely at his ease and acted as if not a thing out of the
ordinary had taken place.

Bob was greatly impressed, and looked with marked respect at the
quiet-mannered detective standing near him. He wondered what it was all
about, and his father's words of the evening before concerning plotters
and spies came again to his mind. He wondered if he could join the secret
service and help his country in that way. Then he remembered that he was
only seventeen and sighed to think that there was probably less chance of
that than there was of being taken into the army.

What was the detective going to do with the German, wondered Bob. The
car was approaching the high school, and he would have to get off soon
and he did not want to miss any of the drama. Suddenly he remembered the
police station on the block adjoining the school building and decided
that that must be the detective's destination. Bob decided to stay on the
car long enough to see anyway.

They passed the high school, and sure enough, as they came to the next
corner, the secret service agent motioned to the German to follow him
out. Bob decided to go along. They got off the trolley car and entered
the police station. Behind the desk sat the sergeant, a man named Riley,
well known to Bob. The detective led his prisoner up to the rail.

"I want you to take care of this man for me, Sergeant," he said, at the
same time displaying his badge.

"Certainly," said Sergeant Riley quickly. "Here, Donovan," he called to a
policeman standing near by. "Take this man and lock him up."

Officer Donovan beckoned to the German who was standing sullenly by the
side of the policeman; his face was white and his eyes gleamed wickedly
while he opened and closed his hands nervously. He even started to
protest, but before he could say anything Sergeant Riley quickly
silenced him. Without further ado he joined the policeman, and together
they disappeared through the door leading out to the room where the
cells were located.

Satisfied that his prisoner was taken in charge, the secret service agent
turned and without further ado left the building.

Bob was much excited and interested. "Who was that secret service man?"
he inquired of the sergeant.

"Dunno," said Riley. "I never saw him before."

"He didn't even make a charge against the man," said Bob.

"I know it," said Riley. "He don't have to."

"I thought you couldn't lock up a man unless there was some charge
against him," exclaimed Bob.

"We have orders to lock up every man them fellers bring in here," said
Sergeant Riley. "We keep 'em here until we get word to do something else
with 'em. It's not for us to ask questions, you know."

"Have you got any more here?" demanded Bob.

"That's the first; we have accommodations for seventy-five though."

"Whew," exclaimed Bob. "Do you think there'll be much trouble with the
Germans here in High Ridge?"

"Can't say. Some of them are a crazy lot. At any rate we're ready for
'em. And what are you doing here at this time o' day anyhow? You'll be
late for school; your visiting hour here is usually in the afternoon."

"I saw that fellow on the trolley," Bob explained. "I wanted to see what
happened to him."

"Well, you better run along," advised the sergeant. "Come in and see
me later."

Bob hurried out and ran down the block toward the high school. His mind
was not on his lessons, however. War was uppermost in his thoughts, and
he still pondered over what his father had said the evening before, and
the recent arrest of the German in the trolley car. Probably after all
there was something in this scare about spies and plotters.

He arrived at school fifteen minutes late, but nothing was said to him.
School discipline was greatly relaxed that morning and instead of
recitations the first period, the principal gave a talk on patriotism and
what the declaration of war would mean. He especially warned the pupils
against acting differently toward any of their number who might be of
German blood.

"They may be just as good and loyal citizens as we are," he said. "At
any rate we must act as though they were until they convince us
otherwise."

Bob considered this good advice, but he still thought of his father's
words and his experience of that morning. "Suppose anything should happen
to father's steel works," he thought. They were making shells for the
Government and could afford to run no risks. "I'll see if I can be of any
help in protecting them," he told himself.

He tried to concentrate his mind on his tasks, but it seemed hopeless.
The words of the German in the trolley came back to him continually--"I
won't fight for Germany. I won't fight for the United States either, but
I'll fight all right." What could he have meant? Did he mean that he
wouldn't try to enlist in either the German or American armies, but that
he'd do his fighting on his own account? How could that be? Bob wondered
if the fighting he would do would be for this country or Germany. If for
this country, it seemed queer that the secret service officer should have
arrested him. The thought of bombs returned insistently to Bob's mind.

Recess came at last and he sought out Hugh Reith, his best friend. Hugh
was a boy of Bob's own age, almost exactly his size, and as they both
liked to do the same things they were bosom companions. Bob was light and
Hugh was dark, his hair was almost raven black, and his eyes a deep
brown. He had large hands and several crooked fingers owing to the fact
that he had broken them playing base ball. He was stronger than Bob,
though not so agile or quick on his feet, and while he could defeat his
light-haired friend in tests of strength he was not a match for him when
it came to speed.

"What do you think of this war, Hugh?" Bob asked eagerly.

"I wish I could enlist," said Hugh.

"So do I, but I guess we can't."

"We're too young, I suppose. Isn't there anything we can do to help?"

"My father thinks we may have trouble with the Germans here in town. If
anything starts you can be sure I'm going to get in it if possible."

"Say," exclaimed Hugh, "did you see young Frank Wernberg this morning
when the principal was making his speech about patriotism?"

"No, what was he doing?"

"Oh, he was snickering and making side remarks to Jim Scott, and making
himself generally objectionable."

"If I'd been Jim I'd have told him to keep quiet," said Bob warmly.

"That's just what he did do finally."

"Did he stop?"

"Oh, for a little while," said Hugh. "He was awful, I thought."

"You know," said Bob, "my father says that Mr. Wernberg is about the most
rabid German in High Ridge. He's crazy on the subject."

"Who, your father?"

"No, Mr. Wernberg. He's crazy on the subject of Germany. He thinks it is
the greatest country in the world and that every one in the United States
is a fool or something."

"Why doesn't he go back to Germany then?" demanded Hugh angrily.

"That's what I--"

"Sh," hissed Hugh. "Here comes Frank Wernberg now."




CHAPTER III

BOB HAS A FIGHT


Frank Wernberg was a stocky, light-haired boy with blue eyes and a pink
and white complexion; that is, it was usually pink and white, though this
morning his face was flushed and red. His eyes had a glint in them not
usually apparent and his mouth was drawn down at the corners into a
scowl. His hair, close-cropped, seemed to bristle more than was its wont;
in fact his usual mild-mannered appearance had given way to one of
belligerency.

"Hello, Frank," said Bob pleasantly.

"Hello," said Frank shortly.

"What's the matter?" inquired Hugh. "You seem to have a grouch."

Something was in the air and the boys felt uneasy in one another's
presence. Usually they laughed and joked incessantly, and Frank Wernberg
was one of the jolliest boys in the school. He was inclined to be stout
and like most fat people was full of fun as a rule. This morning,
however, his demeanor was far from happy.

"Why shouldn't I have a grouch?" he demanded angrily. "I've just been
talking to that chump, Jim Scott. He seems to think that any one who
disagrees with him must be wrong."

Bob nudged Hugh. "What was the argument?" he asked.

"The war," said Frank bitterly. "I said I thought Germany was all
right, and he tried to lecture me about it. Hasn't a fellow a right to
his own opinion?"

"Sure he has," exclaimed Bob. "Any one can think Germany is all right if
he wants to, but no one who is an American can side with Germany against
the United States at a time like this."

"Who says they can't?" demanded Frank flaring up.

"I say so," exclaimed Bob.

"Who are you to tell others what they can do?"

"I'm an American, anyway."

"Well, I'm a better American than you are," cried Frank hotly.

"And you stand up for Germany now?"

"I do, because Germany is right and America is wrong."

The three boys were standing in one corner of the school yard, removed
from all the others so that the rapidly rising tones of their voices
passed unheard. Their faces were now white and their breath came fast.
Hugh had taken no part in the argument thus far, but he stood shoulder to
shoulder with Bob, prepared for any emergency.

"And what's more," exclaimed Frank, "this country was forced into war by
a lot of men who want to make money out of it."

"You're crazy," said Bob.

"No, I'm not crazy either. Some of those men live right in this town too.
I guess you know who I mean all right."

"What do you mean?" demanded Bob in a tense voice. "Name somebody. I
suppose the fact that Germany has murdered a lot of Americans has nothing
to do with our going to war."

"Certainly not," said Frank. "It's the men who want to make money."

"Who says so?"

"I say so, and so does my father."

"Huh!" sniffled Bob. "Name one of the men."

"They may get fooled," said Frank darkly. "Something might happen to
their factories and they'd lose money instead of making it."

"What do you mean by that?"

"Oh, you know all right."

"He hasn't named anybody yet," Hugh reminded his friend.

"That's right," exclaimed Bob. "Who are they, Frank?"

"Well," said Frank, "one of the men who thinks he is going to make a lot
of money but who may get fooled is--"

"Go on," urged Bob, as Frank hesitated.

"Your father!" snapped Frank suddenly.

Quick as a flash Bob's right arm shot out and his clenched fist caught
Frank squarely on the nose. Hugh started forward as if to help his
friend, but Bob waved him aside. "This is my affair," he panted.

Whatever else he was, Frank was no coward. Blood was already trickling
from his nose and the force of the blow he had received brought tears to
his eyes. He recovered himself almost immediately, however, and with head
down rushed at Bob. Bob was waiting for him and sent a crushing blow to
his opponent's jaw. Again Frank staggered back, but a moment later
advanced for more.

He was more wary this time, however, and several of Bob's blows missed
their mark. The boys danced about, each sparring for an opening. They
were of almost equal size and weight, though Frank was probably a better
boxer. Bob, however, was furiously though quietly angry, and convinced
that the right was on his side had an advantage to that extent. Meanwhile
the rest of the boys, attracted by the noise of the combat were running
from all directions to get a close view of the fight. They quickly formed
a ring around the two combatants and urged their favorites on. Most of
them cheered for Bob, he being popular with all, while Frank had not so
many friends.

Bob lowered his guard for an instant, and Frank was quick to take
advantage of the opportunity offered. He dealt Bob a staggering blow
directly over the left eye; a ring on his finger broke the skin and blood
flowed into Bob's eyes, while a swelling appeared almost immediately. He
felt no pain, however, and with a yell of rage he rushed at his opponent.
He had thrown caution to the winds and consequently Frank drove home two
more good stiff punches to Bob's wet and bleeding face. Nothing daunted
Bob clinched and swaying back and forth for a moment they presently fell
to the ground. Over and over in the dust they rolled, each one trying
desperately to get his arms free. The crowd cheered wildly and moved back
to give more room to the fighters.

Presently the spectators saw that Bob was on top. He was in better
physical condition than Frank and this fact was beginning to count. Frank
was short of wind and puffing hard. Bob sat astride him, holding him
pinned to the earth with both knees while he pounded his head up and down
on the ground.

"Lemme up," said Frank weakly.

Bob bumped him once or twice more for good measure. "Had enough?" he
asked.

"Yes," gasped Frank, while the spectators yelled their approval.

Suddenly the cheering stopped and a gap appeared in the ranks of the
onlookers. The principal of the school came running toward the spot where
the fight had occurred.

"What does this mean?" he demanded, much out of breath.

The two fighters picked themselves up slowly. They were smeared with
dirt and blood. Bob's collar was torn and Frank's coat was almost
ripped from his back. Bob's left eye was half closed and rapidly
turning black; Frank's nose was swollen and the skin all scraped off
the side of his jaw.

"We had a fight, sir," said Bob.

"So I see," said the principal, while the crowd snickered.

"He started it," exclaimed Frank.

"I did not," cried Bob hotly, turning half way around as if he was
considering pitching into his opponent again.

"We won't discuss that question here," said the principal. "The best
thing for you two boys to do is to get cleaned up and then come and see
me in my office."

He turned away, slowly followed by Bob and Frank and all the rest of the
spectators. "Good boy, Bob," whispered Hugh in his friend's ear. "You did
him up all right and he deserved it too." Many others also took occasion
to show Bob that they heartily approved of what he had done.

A short time later Frank and Bob stood before Mr. Hewitt, the
principal. He was a kindly man and well liked by all the boys, even if
they did love to imitate the way he had of looking at them over his
spectacles. He was always fair to every one and the boys knew they
could expect to be treated justly by him at all times. They respected
him and looked up to him.

"Well, boys," said Mr. Hewitt, "I'm sorry you had a difference of
opinion."

"That's just what it was, sir," exclaimed Bob quickly.

"Haven't I a right to opinion?" demanded Frank.

"What is your opinion?" inquired Mr. Hewitt.

"Well," said Frank slowly, "I say that the United States is wrong about
going to war with Germany."

Mr. Hewitt glanced at Frank over his spectacles. "I'm afraid I can't
agree with you, Frank," he said. "I don't like war and I don't believe
many of our people do either. There is a limit to any country's
patience, however."

"Some people here want war," said Frank.

"Yes," exclaimed Bob. "He said that my father wanted war so he could make
money out of it."

"He's making ammunition for the Government," Frank exclaimed.

"But at cost price," said Bob. "He will lose money if anything."

"I have always regarded Mr. Cook as one of our best citizens and a fine
man," said Mr. Hewitt. "I think you must be wrong, Frank."

"I tried to convince him that he was," said Bob, stealing a sidelong
glance at Frank's battered features. Mr. Hewitt also looked at Frank and
a faint smile flitted across his face.

"People should be careful about what they do and say these days," he
advised. "You are very wrong to talk against the United States, Frank."

"I only repeated what my father says," exclaimed Frank. "He knows."

"I'm sure he's mistaken this time," said Mr. Hewitt quietly. "I also hope
he won't talk like that again; people's feelings are easily aroused in
times of war and he might suffer harm."

Frank looked sullenly at the floor and said nothing. Bob held out his
hand to him. "Let's shake hands," he said. "We all ought to work together
now. I'll forget this morning if you will."

Frank made no move. "Come on, Frank," urged Mr. Hewitt. "Do as Bob says,
and in the future try to remember that you were born in America, not in
Germany. You were born here, weren't you?"

"No, sir," said Frank. "I was born in Germany."

"Well, at any rate remember that you are living in the United States.
Shake hands and go back to your work, and I hope you will have no
further trouble."

Frank somewhat reluctantly shook hands with Bob and they walked out of
the principal's office together. At the door of the study room Frank
turned to Bob. "I shook hands with you then because I had to," he
snapped. "I warn you though, I'll never do it again, and you'll be sorry
for what you did to me this morning. Yes, you and your whole family!"

Bob was completely taken aback by this sudden outburst but before he
could make any reply Frank was gone. Bob walked slowly to his desk,
carefully avoiding the glances of the many boys in the room who looked
curiously at him and his black, swollen eye.

When school closed that afternoon he hurried away as quickly as he could,
for he had no desire to discuss the matter with his schoolmates. Around
the corner he waited for Hugh and together the two boys started homeward.

"What did Mr. Hewitt say?" asked Hugh.

Bob told him.

"Good for him," exclaimed Hugh. "What did Frank think of that?"

"He was mad," said Bob, and he told his friend of the threat Frank had
made. Hugh was silent for some time.

"We must watch him pretty closely," he said at length.

"Yes," Bob agreed, "and his father too."




CHAPTER IV

HEINRICH AND PERCY


"Bob!" exclaimed Mrs. Cook as her son arrived home that afternoon. "What
have you been doing to get that black eye?"

Bob related the story of his fight with Frank Wernberg. He did not tell
her of the threat Frank had made against him and his "whole family,"
however, for he had no desire to cause any alarm. His mother listened
with a troubled countenance.

"Oh, Bob," she said. "I wish you wouldn't fight like that."

"But he insulted the United States, and father too," Bob insisted.

"I know," she admitted. "Still I hate fighting so. One boy in the family
is enough to worry about."

"Where is Harold?" exclaimed Bob.

"Down at the armory," said Mrs. Cook. "I wish it was all over."

"I wonder if I can go down and see him," said Bob eagerly.

"Perhaps," said his mother. "I don't know." She turned away and Bob
hurried out of the house and turned his steps towards the garage. His
plan was to get his bicycle and ride down to the armory. He entered the
garage just in time to see Heinrich, the chauffeur, stuffing a large roll
of bills into his pocket.

"Whew, Heinie!" he exclaimed. "Where did you get all the money?"

Heinrich seemed much embarrassed at being thus interrupted and colored
violently. "Golly," said Bob, "I never saw so much money in all my life."

"Dot's not so much," said Heinrich. "Besides it iss mine."

"I didn't say it wasn't," laughed Bob.

Heinrich Muller was the Cooks' chauffeur. He was a German, as his name
implies, but he had been in the United States for over twenty years and
had originally come into the employ of the Cook family as a coachman.
Then when the automobile had taken the place of the horse to such a large
extent he had been converted into a chauffeur.

He was a mild mannered, quiet little man, and had always been a prime
favorite with the children of the neighborhood. He could do wonderful
things with a jackknife and the whistles, canes, swords and other toys he
had made for the Cook children had often filled their friends with envy.
He wore thick glasses with gold rims and was very bow-legged. He always
said that his legs were crooked because he had ridden horseback so much
when he was a young German cavalry trooper.

He was a skillful man with horses, and had never liked an automobile
half as much. He loved all animals and they seemed to love him too. At
the present time his pets consisted of a small woolly dog, an angora
cat, a parrot, and an alligator. The last named pet he kept in an old
wash tub, half full of water, and called him Percy. He used to talk to
all his pets as if they were human beings, Percy included, and many
people had ventured the opinion that his brain was not quite as good as
it should be.

"A little bit cracked, but harmless and faithful," was the way Bob's
father described him.

Bob had never seen Heinrich so upset as he was that afternoon. He put the
rolls of bills in his pocket and looked at Bob fiercely through his thick
glass spectacles. His watery blue eyes looked almost ferocious.

"What do you want here?" he demanded.

"My bicycle," said Bob.

"It iss got a puncture," said Heinrich.

"Oh, Heinrich," Bob exclaimed. "Why didn't you fix it?"

"I had no time so far."

"I need a new one anyway," said Bob, looking at his wheel where it rested
against the wall of the garage. "This one is six years old."

"It iss one bunch of junk," said Heinrich.

"Right you are," laughed Bob. "I tell you what, Heinrich; you've got a
lot of money now, why don't you buy me a new one for my birthday?"

"Dot iss my money," said Heinrich insistently.

"Of course it is," exclaimed Bob. "You don't suppose I thought for a
moment that you stole it, do you?"

Heinrich glanced at him questioningly. "Come and see Percy," he said,
apparently very anxious to change the subject.

"What has he done lately?" asked Bob.

"He iss grown."

They approached the tub where the alligator was kept. "I can't see that
he has grown much," exclaimed Bob. "He looks about the same to me."

"He iss now two feet and one inches long," said Heinrich proudly. "He
does not grow fast though."

"I wish my bicycle was fixed," sighed Bob. "I wanted to ride down to
the armory."

"Harold iss in the army," said Heinrich.

"I know it," said Bob. "I wish I was too."

"You want to fight?" Heinrich asked.

"Of course I do. Don't you? You're an American citizen, aren't
you, Heinie?"

"Yes, indeed," said Heinrich quickly. "For twelve years I been one."

"You're all right," exclaimed Bob heartily. "If all Germans were as loyal
as you I wouldn't have this black eye right now."

"A German hit you?"

"He ought not to be a German, but he is," said Bob bitterly.

"Who was it?"

"I won't tell you. What's the use?"

"It was Frank Wernberg," said Heinrich.

Bob looked curiously at the chauffeur. "How do you know?" he demanded.

"Was it him?"

"Yes, but how could you find it out so soon?"

"Mebbe I guess," said Heinrich.

"Probably you did," laughed Bob. "What do you know about the Wernbergs
anyway, Heinie?"

"Nothing," said Heinrich quickly and he acted as though he had made
a mistake. "Look at Percy," he exclaimed. "He iss going down into
the water."

The alligator slipped slowly off the rock where he had been dozing. He
slid quietly into the water and remained floating there all its four
feet standing straight out.

"He iss cute," said Heinrich proudly.

Bob had never considered an alligator as being cute, but he did think
"Percy" was interesting. Little did he dream how much more interested he
would be in the small animal before many days had passed.




CHAPTER V

ON THE BRIDGE


Harold came home for dinner that night. He was serving in the ninth
infantry as a private until such a time as he should pass his examination
and receive his commission.

"Bob has seen active fighting sooner than you have, Harold," laughed Mr.
Cook glancing at his younger son's battered eye.

"Yes, and he won the battle too," said Bob warmly.

"All I can say is," remarked Harold, "that Frank Wernberg must be an
awful looking sight if he's worse than you."

"He is," said Bob. "You ought to see his nose."

"Don't talk about it," urged Mrs. Cook. "I hate it."

"All right," laughed her husband. "Tell us what you have to do down at
the armory, Harold. You were lucky to get off to-night."

"Oh, I've got to go back," said Harold. "We'll probably be ordered out
for guard duty to-night. I may be guarding your plant for all I know."

"I hope we'll need no guards," said Mr. Cook earnestly. "In spite of all
I said last night I can't believe that many people will be disloyal."

"Some German got on our wire by mistake again to-day," said Louise. "He
wanted Mr. Wernberg just as that man did last night."

Mr. Cook shook his head slowly. "I don't like that man Wernberg," he
said.

"Oh, the secret service must be watching him," said Bob. "They seem to be
ready for anything," and he related what had taken place in the trolley
that morning when he was on his way to school.

The telephone rang and Bob answered it to find Hugh Reith on the wire. He
wanted Bob to go down to the armory that night and see the soldiers. Bob
readily agreed.

A short time after supper Hugh arrived at the Cooks', and the two boys
accompanied by Harold set out. They felt very proud to be walking with a
real live soldier, a man in the olive drab uniform of the American Army.
Harold carried a rifle, with an ugly looking bayonet affixed to the
barrel, the whole thing being nearly as tall as he was.

The roll call had been started at the armory and Harold took his place in
line just in time to answer to his name. Bob and Hugh looked on from the
gallery and were greatly impressed by the business-like appearance of the
men, and the curt, crisp orders of the officers. The soldiers were
divided into squads and presently were marched out of the building to
unknown destinations.

"I guess it's all over,'' remarked Hugh.

"Looks so," Bob agreed. "It's early yet though and I don't want to go
home."

"Nor I. What do you say to a walk down by the river? My canoe is in
Brown's boathouse and I'd like to take a look at it. It has been laid up
all winter and I'll want to get it out pretty soon."

"All right," said Bob. "How shall we go?"

"We can take a short cut down over the railroad bridge."

"Come ahead."

They set out through the streets of High Ridge. Few people were stirring
and nowhere were any signs of war. The soldiers had disappeared and the
quiet town seemed far removed from the strife of conflict. It seemed
incredible that even at that moment some one might be plotting to
overthrow the law and order of the little city. It was a far cry to the
crimson-stained battlefields of France.

"No school to-morrow," said Hugh finally.

"That's true," exclaimed Bob. "I had forgotten that this is Friday."

"Nothing to worry about," said Hugh. "No lessons to prepare and as far as
I am concerned I'd just as soon stay up all night."

"We ought to have baseball practice to-morrow," said Bob. "Somehow I've
lost all interest in it though; this war is more exciting to me."

"If we could only do something," sighed Hugh bitterly.

"Where do you suppose those soldiers went?"

"Out for a hike probably. They looked fine, didn't they?"

Bob said nothing; both boys were busy with their thoughts and walked
along in silence for some distance. Presently the steel span of the great
bridge across the Molton River loomed ahead of them in the darkness.

"There's the bridge," Bob exclaimed.

It appeared ghostly in the dark, the big steel girders taking on weird
and fantastic shapes. A train rushed across its span, roaring and
throwing a shower of sparks high into the air.

"Come on," urged Hugh and scrambled up the embankment.

Bob followed close at his heels and together they made their way towards
the bridge itself. They soon found themselves picking their way on the
open ties above the water; as they were headed west they of course took
the east-bound track. The walking was precarious and they had to pay
close attention to what they were doing, for a misstep might prove fatal.

Suddenly a sharp command to halt startled the two boys. They stopped
short and peered intently about them in the dark.

"Who are you?" demanded a curt voice, and Hugh and Bob saw the figure of
a man in khaki outlined against the skyline. A faint flicker of light
showed a keen-edged bayonet affixed to the gun he carried.

"Who are you!" repeated the voice, strangely familiar in tone to both of
the boys. "Come over here, and keep your hands over your head."

"Harold!" exclaimed Bob suddenly. "Is that you?"

"That you, Bob?" queried Harold, for the guard proved to be Bob's older
brother. "Who's that with you?"

"Hugh."

"Well, it seems to me you two are pretty nervy," said Harold testily.
"What are you doing down around here anyway?"

"We were going down to Brown's boathouse to see Hugh's canoe," Bob
explained. "We thought we'd take the short cut over the bridge."

"And stand a good chance of getting shot," said Harold. "All bridges
are guarded by soldiers with rifles, and we're not supposed to wait
forever before we shoot either." Hugh and Bob had advanced to the spot
where Harold was standing, and the three young men were grouped in a
small circle.

"We never thought of that," said Bob sheepishly.

"Don't you know the United States is at war?"

"Of course we do."

"Well, then--. Sssh!" hissed Harold suddenly.

He peered intently down the railroad track. The figure of a man could be
seen approaching. "Get back, quickly," whispered Harold, and the two boys
flattened themselves against one of the big steel girders.

Nearer and nearer came the man. Harold stood motionless, his gun half
raised and ready for instant action. Hugh and Bob looked on, fascinated.
When about thirty yards distant the man stooped and appeared to be
fumbling with something at his feet. Only for a moment, however, for he
soon straightened up again and proceeded on his way.

"Halt!" commanded Harold sharply.

The man started, and then came to an abrupt stop.

"Come over here," Harold ordered.

His order was obeyed somewhat slowly, but without question.

"What's your name?" queried Harold, as the man came up to him.

There was no answer.

"What's your name?" repeated Harold shortly.

"John Moffett," said the man sullenly.

"Where do you live?"

"High Ridge."

"Where in High Ridge?"

"Elm Street."

"What number?"

"Twelve eighty-two," said the man after a moment's hesitation.

"What are you doing on this bridge?"

"I been across the river to see my brother."

"Why didn't you take the passenger's bridge then, instead of this?"

"This one is shorter for me."

"Oh, no, it isn't," said Harold quickly. "The other one takes you right
into Elm Street."

The man offered no comment.

"Why did you bend over down there a minute ago?" Harold asked.

No answer was forthcoming.

"Answer my question," ordered Harold curtly.

The man shifted uneasily from one foot to the other. "My shoe lace came
undone," he muttered finally. All the time he was talking he kept
looking behind him and over the route he had just come. He seemed to be
intensely nervous about something.

Harold looked at him up and down from head to foot, as best he could in
the poor light. He appeared undecided as to what he should do.

"You'd better come along with me," he said finally. "I guess the captain
might like to talk to you for a few minutes."

"Where is the captain?" demanded the man.

"That's nothing to you," said Harold. "You do as you're told. You walk on
ahead of me and don't try any funny business; I'll be right behind you
and my gun is loaded."

"Which way?" the prisoner asked.

"That way," directed Harold, indicating the High Ridge end of the bridge
with the point of his bayonet. "As long as you live in High Ridge I'll
see you part way home," he added drily.

"Yes, sir," exclaimed the man, it seemed almost joyously. He set out
immediately, Harold following close at his heels.

"You two better go home," Harold called to Bob and Hugh as he walked off
down the track.

"All right," called Bob, and then he turned to his friend. "We'll take
our time," he announced.

"Sure," agreed Hugh. "Who do you think that man was?"

"I don't know, but he did act sort of queer I thought. Probably Harold
was wise to arrest him."

"What'll they do with him?"

"Oh, lock him up probably," said Bob carelessly. "I guess some officer
will question him and if he's all right he'll be let go; otherwise I
don't know what will happen to him."

"How about the canoe?" suggested Hugh.

"You mean, shall we go on to the boathouse?"

"Yes."

"The other end of the bridge is probably guarded too," said Bob. "We
would be held up there and maybe be arrested ourselves." He peered
earnestly down the track which led over the bridge to Rivertown on
the opposite bank. Suddenly he started violently and clutched Hugh
by the arm.

"What's that?" he gasped in a terror-stricken voice.




CHAPTER VI

HUGH HAS AN IDEA


"What's what?" demanded Hugh, peering in the direction Bob indicated.

"Look!" cried Bob.

"I am looking. What is it?" The tone of his friend's voice had alarmed
him greatly, though he did not know what it was that Bob saw.

"Can't you see? Right down there!"

"Where? Where?" pleaded Hugh. "Tell me, Bob."

"Down under the track. I see sparks."

"It's a bomb," cried Hugh suddenly catching sight of the little flashes
of light. "It's a bomb that man planted there."

"What shall we do?" cried Bob, acting as if he was ready to turn and run.

"Go and get it," said Hugh instantly. "Come along," and he started
towards the spot of danger. Spurred on by his comrade's show of courage,
Bob followed.

Their hearts were in their throats and terror held them in its grasp as
they hurried along. The little sparks still appeared, and the sputtering
of the fuse could be heard distinctly as they ran forward. The footing
was dangerous and who could tell but that at any moment the bomb might
explode and blow them into eternity.

Hugh reached the spot first. He was outwardly calm, but had the sun been
shining his face would have shown white and frightened. A second later
Bob arrived and stood beside him.

"There it is," he gasped. "It's a bomb all right."

"Pinch the fuse," cried Hugh excitedly. "Put it out."

Both boys reached for it, but Bob was first. He had completely recovered
his nerve now and was perhaps even more self-possessed than Hugh.

Bob grasped the lighted part of the fuse between the thumb and forefinger
of his right hand. He squeezed it tightly, but quickly withdrew his hand
with a cry of pain. The fuse still sputtered.

"Let me!" almost sobbed Hugh. "Let me try."

He repeated Bob's performance, except that he held on in spite if the
pain he suffered. With tight-shut lips and set jaw he pinched the fuse
with all his strength. Finally he could stand it no longer and let go.

"It's out," cried Bob. "No, it isn't either," he exclaimed a second
later as the fuse once more showed red and the tiny sparks again made
their appearance. "We'd better run for it, Hugh. What's the use in our
being blown up along with the bridge?"

"Get out of the way!" ordered Hugh, and Bob obeyed at once. There was
something in the tone of his friend's voice that made him hasten to do
as he said.

Hugh knelt on the ties and leaned down over the bomb.

"Here comes a train," cried Bob suddenly. "On this track too."

Hugh paid no attention to this warning. He picked the bomb up in his two
hands and staggering under its weight, carried the spitting and
sputtering engine of death to the edge of the bridge. With a supreme
effort he hurled it from him. A moment later a splash told that it had
landed in the river below.

"That'll never do any more harm," he gasped faintly.

"Stay there, Hugh!" shouted Bob. "Look out for the train!"

The two boys crowded close against the side of the bridge and a moment
later a heavy train thundered past them. Through the lighted windows
could be seen crowds of passengers, and Hugh and Bob shuddered as they
thought what might have happened to the train with its load of precious
human freight had the bomb exploded. They felt faint and weak after their
experience and presently sat down until their shattered nerves should
have recovered somewhat from the shock.

The night was cool, but Bob mopped his perspiring brow. "Whew," he
gasped. "That was a close call."

"I should say it was," echoed Hugh. "What luck that you should have
seen those sparks when you did! There was only a couple of inches of
fuse left."

"Lucky you were with me too," said Bob soberly. "If I'd been alone I
think I would have run for home."

"Haven't you two gone home yet?" demanded a voice, and the two boys
looked up to see Harold standing over them.

"Not yet," said Bob.

"Well, you'd better skip," Harold advised. "You'll get in trouble
around here."

"There'd been more trouble if we hadn't been here," said Bob quietly.

"What do you mean?"

Bob related the story of the bomb to his brother.

"Say!" exclaimed Harold in an awestruck voice. "That was pretty good work
of you two. A train came along on that track too."

"Hugh got the bomb out just in time," said Bob.

"Say," repeated Harold. "Say," he said again, completely overcome.

"Do you think they'll let us enlist on the strength of what we did?" Hugh
asked hopefully.

"I doubt it," said Harold. "I'll certainly speak to the captain about
you though."

"We might as well go home now, I guess," said Bob. "You don't want to see
your canoe tonight, do you?"

"No," replied Hugh grimly. "I've lost all interest in canoes for
the present."

They said good night to Harold and started homeward. They still felt
a little shaky as a result of the bomb episode, but before long the
walk and the crisp night air had refreshed them and their spirits
once more revived.

"I wonder what they'll do to that German," exclaimed Bob.

"Harold said they had locked him up for over night, and I guess when they
hear what he tried to do, they'll keep him longer than that."

"They'll send him to jail probably."

"I hope so," said Hugh. "Any man who would try to blow up a bridge and
kill crowds of people deserves worse than jail."

"They'll give him five or ten years all right," said Bob.

"Yes, and when they try his case we'll have to act as witnesses I
suppose."

"I wouldn't mind that," Bob exclaimed. "It might be a lot of fun."

"Aren't these plotters silly?" said Hugh. "They may be able to blow up a
plant or a bridge here and there, but they'll lose more than they gain."

"Why so?"

"Because it'll make the people mad. When they once get angry they'll
fight and work much harder to defeat Germany. Half the people in this
country don't seem to realize that we are at war now, but when a few of
them get blown up we'll begin to do something."

They discussed the war and the possibility of sending American troops to
France. Hugh wanted to go into the aviation corps when he was old enough
but Bob thought the infantry and solid ground under his feet would be
good enough for him.

Presently they came near home. Hugh lived two blocks farther down
the street than Bob and consequently he had to pass the Cooks' house
on his way.

"There's the Wernbergs'," said Bob. "A light in the second story back
window, and two automobiles in front."

"Do you suppose they're up to anything?" exclaimed Hugh.

"I suspect them all right, but how can we prove it?"

"I have an idea," Hugh exclaimed suddenly. The two boys were standing on
the opposite side of the street from the Wernbergs' house, regarding it
curiously.

"What is it?"

"Can you get your automobile?"

"I guess so, if Heinrich hasn't taken the family out."

"Let's get it and follow one of those machines. In that way we can see
where the people live who are at the Wernbergs'. Maybe we can learn
something about them if we know who they are."

"A good scheme," exclaimed Bob readily. "We'll have to be awfully
careful though; if they ever found out we were following them it might
go hard with us."

"We'll be careful all right," said Hugh grimly. "Come ahead, we want to
be ready to start and they may leave at any time."

The two boys walked quickly up the street, taking care to keep on the
opposite side from the Wernberg home. When they arrived in front of the
Cooks' they darted across the street and hurried along the driveway
until they came to the garage. The door was shut and locked. Bob
knocked loudly.

There was no reply. Bob looked at his watch under the light of a match
which Hugh struck. It was twenty minutes of eleven.

"That's queer," he muttered. "Heinie is usually in bed long before this."

"Maybe he is now, and is asleep," Hugh suggested.

Bob glanced up at the second story window. "I don't think so," he said.
"The window is closed in the room where he usually sleeps, and I know he
is a crank on fresh air."

"Throw some gravel at it," said Hugh. "That'll get him up if he's there."

This plan was followed, but with no success.

"He's out," said Bob finally. "What'll we do?"

"Is the car there?"

"Yes, but what good will it do us if we can't get in?"

"Haven't you got a key to the garage up at the house?"

"Father has one, but I don't dare wake him now." Bob glanced at the house
and the absence of lights on the first and second floors convinced him
that his family were all in bed. A single light shone from a window on
the third floor where Lena, the cook, slept.

"Maybe we can force a window," suggested Hugh. "You can open the door
from the inside, can't you?"

"Oh, yes," said Bob. "Let's try a window anyway."

They went around the corner of the garage and the first window they tried
yielded immediately. A moment later both boys had clambered inside, and
presently Bob found the electric light button. As the light flooded the
garage Heinrich's angora cat rose sleepily from the tonneau of the
automobile and stretched himself. A cloth covering over the parrot's cage
kept that garrulous bird quiet. Percy lay stretched out in the water
which filled his tub.

"The dog must be out with Heinrich," said Bob.

He seated himself in the driver's seat of the car, and Hugh lifted the
drowsy cat to the floor. Bob pushed a button, put his foot on the
self-starter and the engine started. Heinrich always backed the car into
the garage so that it was headed in the right direction as it stood. Hugh
undid the spring catch on the door and rolled the door back. They were
now ready to start.

"I'll go down by the street and watch the Wernbergs," said Hugh. "I hope
they haven't gotten away while we have been fooling around here."

"I guess not," said Bob. "When they start you whistle twice and I'll be
with you right away."

"All right," agreed Hugh. "You'd better run with your lights dimmed."

"I shall, don't worry."

Hugh hurried away. Bob was left alone in the car and he presently shut
off the engine. He had wished to warm up the motor so that it would start
readily when the time came; he was convinced that it would do so now.

He thought over the events of the day, and for the first time he realized
that he was tired. Excitement had spurred him on and the intense interest
he took in the war had made him forget all else. He wondered if he and
Hugh were starting off on a wild goose chase now. What particular reason
had they to suspect the Wernbergs anyway? True, all Germans were more or
less under suspicion just then, but why the Wernbergs any more than the
others? He recalled his fight with Frank that morning, and his father's
remarks. Perhaps it was just as well to go out that night after all.

Bob thought of the war and the terrible things the Germans had done. What
brutes and beasts they were! The Germans had been busy in the United
States too. The big factory at Eddystone had been blown up that day, with
the loss of a hundred and twenty-five lives, mostly of girls. That
showed what the American people had to guard against.

"I hate them all!" muttered Bob angrily. He took that back a moment
later, however, as he thought of Heinrich. Surely their chauffeur was as
faithful and kindly a soul as ever lived; his love for animals proved
that. Then there was Lena, their cook, a buxom woman of forty who had
never been heard to utter a cross word in her life.

Heinrich was capable of getting mad, however, particularly about the car.
Bob wondered what he would say if he should arrive home now, and find him
preparing to go out in it and perhaps get it dirty.

His reverie was suddenly interrupted by the sound of two whistles. A
moment later the motor was purring softly, and with the headlights
dimmed, the big sixty horse-power car slid out of the garage and started
silently down the driveway.




CHAPTER VII

IN THE NIGHT


"They're starting," said Hugh in a low voice. He jumped upon the running
board as Bob came along, and climbed into the front seat beside him.
"Let's wait here a minute," he whispered.

Down the street in front of the Wernbergs' house they could see men
getting into the two automobiles. Presently the whirr of the motors came
to their ears and the two cars started. One came towards them and the
other went in the opposite direction.

"Which one shall we follow?" whispered Bob.

"Let's follow the one going the other way."

They rolled out of the driveway and started down the street. As they
turned into the avenue the first car passed them, a gray roadster
bespeaking power and speed in its every detail. Two men were seated in
it. Bob and Hugh obtained a fleeting glimpse of them as they flashed by.
The tail light of the car they intended to follow showed a dim, red spot
far down the street.

"Speed her up a little, Bob," urged Hugh. "We don't want to lose them."

"We can't keep too close to them either," said Bob. "Besides, my thumb
and forefinger are pretty sore from that fuse burn and it's hard to grip
the wheel."

"Mine are sore too," said Hugh. "Put on gloves."

"I haven't any with me."

"I have; take mine."

Still watching the small red dot ahead of them Bob managed to slip on
Hugh's right-hand glove. It was a great help to him in driving.

"They've turned a corner," exclaimed Hugh suddenly. "Faster, Bob!"

Bob pressed his foot on the accelerator and the car leaped forward as if
it were a living thing. A moment later they reached the cross street and
turned into it, peering anxiously ahead. The car they were following was
still in sight.

"Keep about two hundred yards in back of them," Hugh advised.

"We mustn't lose them."

"No, and we don't want them to get suspicious either."

"They're turning another corner," exclaimed Bob after a few moments.

"Speed it up now that they can't see us."

Bob did so and they came to the corner just in time to see the car they
were following pull up at the curb in front of a white stucco house.

"Go ahead, Bob! Go ahead!" urged Hugh. "Don't turn!"

Bob kept straight on. "What street was that?" he asked.

"Elm Street."

"Isn't that where the German on the bridge told Harold he lived?"

"Why so it is," exclaimed Hugh.

"I wonder what number that house is."

"I don't know. Let's see, Howard Seeley lives on Elm Street, just the
next block down; his number is eleven hundred and something."

"The German told Harold he lived at twelve eighty-two, and I'll bet you
that was the house."

"Whew!" whistled Hugh. "I wonder if it was."

"They probably went to find out why the bridge wasn't blown up to-night,"
said Bob. "Do you suppose that could be it?"

"Maybe. We could have told them quicker if they'd come to us
though," chuckled Hugh. "They'll probably give that fellow the
mischief for failing."

"They can't get at him if he's in jail."

"That's so. Suppose we're called as witnesses at his trial? They'll learn
that we spoiled their game and our lives won't be worth two cents."

"Well, if those men are plotters we must prove it before the case even
comes to trial."

"Do you suppose they have a regular organization to blow up everything
around here that they can?" said Hugh. "I should think the secret service
would get after them."

"Probably it has; no doubt the names of all those men are listed."

"That is, if they really are plotters."

"Of course. Where are you going!"

They had kept straight on down the road and were now on the outskirts of
the city. The houses were fewer and more scattered all the time and
presently the boys would be in the open country.

"I don't know," said Bob. "I was just going ahead without thinking."

"We'd better go back, hadn't we? We must be about three miles from home."

"There's a road up ahead here to the right," said Bob. "We can turn down
there and go back that way."

When they were about two hundred yards distant from the road in question,
an automobile came out of it and turned into the main highway. A moment
later it was speeding along in front of Bob and Hugh, the roar of its
cutout coming faintly to their ears.

"Bob," exclaimed Hugh excitedly, "that's the gray roadster!"

"What gray roadster?"

"The one we passed in front of your house. It came from the Wernbergs'."

"Shall we follow it?"

"Certainly. It's going like the wind though."

"Well, it can't lose us," said Bob grimly. He advanced the spark, gave
the motor more gas and they were soon tearing through the night at fifty
miles an hour. Over the crest of a hill in front of them, the gray
roadster was outlined for a moment and then disappeared.

Up the grade of the hill Bob drove the big car. When they arrived at the
top they peered ahead anxiously for any sign of the machine they
followed. Nothing was to be seen of it.

"It's gone," exclaimed Hugh.

"Perhaps not," said Bob. "It can't be very far ahead of us anyway."

They continued down the road at breakneck speed, passing through a clump
of woods that lined both sides. Bob forced the motor to its utmost, but
no sign of the gray roadster could they discover. Finally he brought the
car to a dead stop and turned to Hugh.

"What became of that car?" he demanded. "They weren't far enough ahead of
us to have gotten out of sight so quickly."

"They must have turned off into another road," said Hugh. "I don't see
what else could have happened."

"But there are no roads into which they could have turned."

"Are you sure?"

"Positively."

Both boys relapsed into silence, completely mystified by the
strangeness of the thing. Apparently the roadster had vanished from the
face of the earth.

"Wait a minute," cried Bob suddenly. "There is a road back there too."

"I thought there must be."

"Remember those woods back there, just this side of the hill?"

"Yes. That's where we used to go for chestnuts in the fall."

"That's the place. Remember the old house back in there?"

"It's deserted and tumble-down."

"I know it, but there's an old wagon road leading to it."

"Do you think that is where they went?" exclaimed Hugh in surprise.

"Where else could they have gone?"

"I don't know, I'm sure."

"Shall we go back there and see?"

"We can't run the car in there."

"Why not? We can if they can."

"Suppose we should meet them coming out?"

"That's right," exclaimed Bob. "I tell you what we can do though.
We'll run back down the road and leave the car and then go to the old
house on foot."

"Good scheme," said Hugh readily. "We can hide the car somewhere I
suppose."

"Oh, yes. We'll leave it a little way off the road under some trees."

A few moments later Bob had turned the car around and they were speeding
back in the direction whence they had come.

"You know where the road is, don't you?" asked Hugh.

"I do," said Bob confidently. "We'll leave the car about a quarter of a
mile this side of it and then walk."

"I wonder if they could have gone to that old deserted house,"
mused Hugh.

"Maybe. I swear I don't see why though."

"We're probably chasing moonbeams," said Hugh.

"Perhaps we are, but we're having a lot of fun anyway."

"Of course we are," exclaimed Hugh, "and I'm for going ahead."

A moment later Bob slowed down the car. A clump of trees appeared
alongside the road, and shifting into second speed Bob carefully steered
his course toward them. In the shadow of the trees he stopped, shut off
the motor, turned off the lights, and stepped out. Hugh got out on the
other side.

"Here we are," whispered Bob. "I guess it's all right to leave the
car here."

"I should think so," Hugh agreed. "We're about fifteen yards from the
road and I don't believe any one would notice it in here."

They started down the road, keeping well to one side, so that they would
not show up against the faint white ribbon of the highway as it stretched
through the country. After a walk of about five minutes Bob halted.

"There's the road," he whispered, pointing ahead.

"Come on then," urged Hugh. "Carefully now."

It was a weird sensation to be stealing along in the darkness, and the
hearts of both boys were pounding. They turned from the main road and
started down the narrow wagon track through the woods. It was much darker
there and difficult to pick one's path.

A dry twig snapped under Hugh's foot and the boys stopped short, their
breath coming fast. The hoot of an owl directly overhead startled them
violently and unconsciously they clutched each other's arm. The giant
trees loomed black and forbidding in the darkness, and it was easy to
imagine all kinds of things lurking behind to spring out at them.

"I don't like this," whispered Hugh. "How far is it from here?"

"Just a short distance. I don't like it either."

Presently Bob tugged at Hugh's sleeve. "There's a light," he said softly.

A faint glimmer appeared through the darkness ahead. Presently the boys
were able to see that it came from a lantern held by some man standing in
the open doorway of the old house. A moment later four others appeared
from within and came out to the tumble-down porch. Bob and Hugh looked on
with bated breath. What could it all mean?




CHAPTER VIII

A STRANGE OCCURRENCE


The man with the lantern advanced to the edge of the porch, holding the
lantern at arm's length and shoulder high. In the flickering light Bob
and Hugh could see the others putting on their overcoats. Presently there
was a flash of light as the powerful searchlights of an automobile were
turned on; only for a second or two, however, as they were quickly
extinguished.

"There's the gray roadster," whispered Hugh.

The two boys were crouched behind a fallen tree, an obstruction they had
been on the point of climbing when they had spied the lantern. They could
hear the men walking about near the house, and frequently could even
catch the sound of voices.

Presently they heard the whirr of a motor. Dimmed lights were turned on
in the roadster and soon it started.

"Lie low," whispered Hugh. "They mustn't see us."

Bob needed no cautioning on that score, however.

The car rumbled toward them as if it were feeling its way. The
wagon-road was some ten yards to the left of the spot where the two boys
were concealed. Directly to it the roadster went, its two glowing eyes
giving it the appearance of some gigantic bug. With bated breath Hugh and
Bob watched its progress. Presently it passed them and lumbered away over
the rough road.

"How many men were in it?" whispered Hugh.

"Three, I think."

"There were only two when we passed it in front of your house."

"I know it. There must be a couple more men here, too."

"Ssh," hissed Hugh softly, grasping his companion by the wrist.

Voices could be heard, coming nearer and nearer to their hiding place.
Once again the two boys almost stopped breathing while they waited for
the speakers to pass. They could make out two shadowy forms following the
same course taken by the automobile. The two men conversed earnestly
together in tones so low, that the listeners could not overhear what was
said. After a few moments the sound of the voices died away and Hugh and
Bob were left alone. That is, they were alone as far as they could tell.

"Well," said Hugh finally. "They're gone."

"Seems so," admitted Bob. "We can't be sure though."

"Were those men talking German?"

"I couldn't tell."

"Neither could I for sure, but I thought they were."

"Probably so," said Bob. "At any rate it looks to me as if there was some
queer business going on in this place."

"It certainly does. I wonder what's in that house?"

"Shall we go and see?"

"You don't catch me in that house at this time of night," said
Hugh grimly.

"How about coming out here to-morrow, then?"

"To-morrow's Saturday, isn't it?"

"Yes."

"All right," said Hugh. "I'll come out with you."

"And now we'd better go home."

"I guess we had. It must be nearly midnight."

They arose from their cramped positions on the ground and stealthily
began to retrace their steps. They were even more wary on their way out
than they had been going in, for they could not be sure that they would
not meet some of the men they had seen about the old house. Just before
they came to the end of the wagon-road they heard the sound of a motor
and saw the lights of an automobile speeding down the main road in the
direction of High Ridge.

"Sounds like our car," said Bob. "All those motors make the same sort
of noise."

"Pretty good ears you have," remarked Hugh.

"You ought to see old Heinie," said Bob. "He may look stupid, but he can
tell almost any make of car just by the noise it makes."

"What'll he say when you get home?" queried Hugh.

"He'll be mad. He doesn't think I know how to drive the car, and if there
is any dirt on it he'll be madder yet."

"The roads aren't muddy now though."

"I know it, but he'll be cross if there's dust on it even."

They emerged on the main road, looked carefully in both directions, and
then still keeping to the side of the road, started back toward the spot
where they had left the car. A ghostly moon, in its last quarter, shed
its pale light on the highway, and aided the boys to distinguish their
surroundings.

"There's the place," said Bob a moment later.

They ran quickly across the road and hurried towards the clump of trees
where they had hidden the car. Both boys would feel relieved when they
were seated in their conveyance once more, and on their way home. It was
nervous work prowling around the countryside at night with a suspicious
gang of men lurking near.

Bob and Hugh hurried along side by side and presently came to the patch
of trees, which was their destination. A feeling of relief came over them
that soon they would be speeding back to High Ridge.

Suddenly Bob uttered an exclamation of surprise and stopped short.

"The car is gone," he gasped.




CHAPTER IX

ANOTHER SURPRISE


At first the two boys were too amazed to speak. They stared blankly at
the spot where the car had been concealed. It now was nowhere to be seen.

"Is this the place?" exclaimed Hugh, the first to regain his senses.

"I know it is," said Bob. "I ran the car right up under that big birch
tree so that I could surely mark the spot."

"Well!" gasped Hugh, unable to say more.

"What'll we do?" Bob almost sobbed. "Some one has stolen the car, and it
is all my fault. What will father say?"

"You'll have to tell him the circumstances," said Hugh lamely. "I don't
know what else you can do."

"But the car is gone," insisted Bob, his mind unable to grasp any idea
beyond that. "The car is gone."

"Maybe it'll come back," said Hugh. "Stolen cars are often recovered."

He lighted a match and held it close to the ground. There were the
marks made by the tires in the damp earth. There was no doubt that this
was the place.

"Who could have taken it?" demanded Bob.

Both boys were silent and the same thought flashed through their
minds at once.

"One of those men from that old house," said Hugh.

"They must have had sentries posted," said Bob and he glanced about him
nervously. "Probable they watched us leave it here and when we went back
into the woods they took it. Probably they followed us and watched us all
the time too; very likely they're watching us now."

"Let's go home," exclaimed Hugh. "I've had enough of this."

"But the car," protested Bob.

"It's gone, isn't it?" said Hugh. "We can't find it by just standing
around here. The best thing we can do is to hurry back to High Ridge as
fast as we can and report it to police headquarters."

"It's over three miles," said Bob.

"Suppose it is," Hugh exclaimed. "Suppose it was twenty miles: we'd have
to go just the same. We may get a lift on the way."

"Not at this time of night."

"Anyway we'd better start; we may be in danger here."

This latter consideration had great weight with Bob. He realized that
enemies of one kind or another were there, or had been recently, in that
neighborhood and he had no desire to meet them, unarmed as he was. His
judgment also told him that Hugh's suggestion about reporting the loss of
the car to the police was the only feasible one under the circumstances.

"Come on," he urged. "Let's go home."

"Some one may come along and offer us a ride," said Hugh hopefully.

"I'm afraid there won't be many people out at this time of night,"
returned Bob disconsolately. "I wish I knew what had happened to the
car."

They proceeded in silence, glancing about them nervously for fear that
they might be the victims of some further surprise. For a half-mile
they kept to the side of the road, for little as they cared to walk
where the darkness was thickest, they knew they would not be as exposed
there as they would be in the middle of the road. When they reached the
top of the hill, however, they became bolder and ventured out upon the
paved highway.

They walked swiftly, every few yards one or the other of the boys turning
to glance behind them to see if they were followed. The night was clear,
and the stars were shining brilliantly; hardly a breath of air was
stirring. Presently they came within sight of the town, and the sound of
the clock on the town hall striking one came faintly to their ears.

"Whew," said Bob, "it's late."

"I should say so," Hugh agreed, "and I was just thinking of everything we
have done to-day. We've certainly been busy."

"We may be even busier to-morrow."

"Why so?"

"Well, if we go back to that house again, you can't tell what we'll
get into."

"I wonder if we ought to report to the police what we've seen."

"Probably we should," said Bob. "I'd like to go it alone though."

"And so should I. Let's wait a day or two longer anyway."

"I hope it won't be too late then."

"We'll risk it anyway," said Hugh. "Look, here comes an automobile."

"It's going the wrong way for us. Get over on the side of the road."

In the distance appeared the headlights of an automobile rapidly
approaching. The two boys hurried to one side of the road and took up
their positions behind the shelter of some low growing bushes. The car
was traveling fast and as it neared the spot where they were concealed
they could hear the thunder of the cutout. A moment later it roared past
them and disappeared.

"Hugh," exclaimed Bob. "The gray roadster!"

"It was for sure!" said Hugh. "What do you think of that?"

"It was going back to the old house probably."

"I guess it was. Perhaps after all, we should report to the police."

"Wait till after to-morrow," said Bob. "We'll go out in the morning and
take a look around there on our own account."

"We may have to spend to-morrow looking for your car."

"That's true, but let's wait and see what happens anyway."

They continued on their way homeward and soon came within the outskirts
of the town. The houses were darkened and apparently every one was in bed
and asleep. The sound of the boys' footsteps on the pavements echoed
loudly along the still, deserted streets.

"Here's Elm Street," said Hugh. "Let's turn down here; it's on our way
home and we can pass right by that stucco house."

"All right," Bob agreed, and they turned the corner.

"That's the place," whispered Hugh a few moments later.

"There's a light in the third story," said Bob in a low tone.

"Perhaps they're waiting up for that German bomb planter," chuckled
Hugh. "I guess he won't be home to-night."

"Don't joke about it, Hugh. I feel sorry for the man's family."

"So do I, but I don't feel sorry for him."

"I should say not! Anything they do to him won't be half bad enough."

"The snake," muttered Hugh. "I'd like to have one look inside that room
up there though and see what is going on." He glanced up at the lighted
window questioningly. As he did so the shade was thrown up and the
window opened by some man who thrust his head out and looked around. Bob
and Hugh shrank back within the shadow of a nearby tree. They caught
only a fleeting glimpse of the man's face, and saw that it was no one
they knew. He had closely cropped hair and a bristling mustache turned
up at the ends.

"Who do you suppose that was?" whispered Bob a moment later, as the man
they watched withdrew his head and shut the window.

"Never saw him before," said Hugh.

"He looked like a German though. Let's get home before he comes outside
and begins to prowl around."

Walking on the ground so that they would not make any noise they hurried
on. A few moments later they stood in front of the Cooks' house.

"There's a light in your house too," said Hugh. "This and that house on
Elm Street are the only ones where people seem to be awake."

"That's Lena's room," said Bob.

"The cook?"

"Yes."

"She's a German, isn't she?"

"Look here, Hugh," laughed Bob. "You can't make me suspicious about
Lena. She has been our cook ever since I was born. She's the most
faithful and kindhearted woman that ever lived. Why she's practically
one of the family."

"Then what is she doing up there all this time?" demanded Hugh. "Her room
was lighted up when we started out."

"I don't know what she's doing," said Bob. "Reading, maybe. You can't get
me excited about her, and just because some Germans are disloyal you
mustn't think they all are."

"All right," said Hugh. "I'd watch them all though."

"You're crazy," said Bob. "What I want to know is what happened to our
automobile. Tomorrow morning before breakfast you'll see me on my way to
police headquarters to report it. Heinie was going to fix the puncture in
my bicycle to-day and I'll go down on that."

"Will you telephone to me about eight o'clock?"

"I will," said Bob, "and if there's nothing we can do about the
automobile well take our bicycles and ride out to the old deserted
house."

"Good, and now we'd better sneak to bed, for we shan't get much sleep
as it is."

"All right. Good night."

"Good night," said Hugh and turned off down the street.

Bob made his way quietly across the lawn towards the house, glancing up
curiously once or twice at the lighted window in Lena's room. As he
looked the light went out. "Poor old Hugh," he thought. "How silly he is
to be suspicious of Lena." He tiptoed up the steps and across the porch,
let himself in carefully with his latch key, and stole upstairs.

He wished to get into bed without waking any of the family, and was
successful in this, for soon he was snugly under the covers without
having disturbed any one. It was a long time before sleep came to him,
however. He was greatly worried about the loss of the car and he dreaded
having to tell his father about it the next day. Of course his father
would understand, but no one could be blamed for being upset at the loss
of a new automobile, particularly as the result of what might prove to be
a wild goose chase.

Heinrich too would be furious, and Bob expected their chauffeur to knock
on his door at any moment and demand where the automobile was. Heinrich
did not go to bed until the car was safely in the garage, and as a rule
he washed it no matter how late the hour was.

Bob's black eye throbbed somewhat too, his fingers smarted from the burn
of the lighted fuse, and his brain was reeling with the events of the
day. At length, however, he fell asleep and strange to say he slept
dreamlessly. He had taken care to set his alarm-clock for half-past six
and it seemed to him that his eyes had been closed only a very few
minutes when it went off close beside his ear. He clutched it quickly and
stifled the alarm so as not to awaken the rest of the household; a moment
later he had jumped out of bed and was getting into his clothes.

He glanced out of the window and saw that it was light outside. The early
morning sun shone on the bare limbs of the trees and made them glisten.
Here and there a bud could be seen almost ready to burst its shell and
Bob rejoiced to see signs of the coming of spring and summer. He was not
happy, however, for the loss of the car weighed him down and oppressed
him. Even the awakening beauties of nature did not cheer him up and that
was unusual in Bob's case.

A few moments later he was fully dressed except for his shoes. He held
them in one hand, and in his stocking feet slipped out of his room and
stole downstairs. He opened the front door carefully and then sat down on
the steps to put on his shoes. As he busied himself a bicycle passed
along the street in front of the house, and Bob recognized the rider as
Frank Wernberg.

"What's he doing out at this time of day?" muttered Bob angrily. He sat
motionless and as Frank did not look toward the house he decided that he
had not been seen. Bob yawned, rubbed his eyes sleepily, and stretched.
He suddenly recalled the loss of the automobile, and jumping to his feet
started toward the garage.

As he came near he saw that the front door of the garage was open. That
was queer, he thought, as Heinrich never left it open at night. Then he
recalled that he and Hugh had left it open the night before and that
probably Heinrich had left it undisturbed so that they could run in the
car without trouble when they returned. Heinrich had no doubt come in and
gone to sleep, and had not yet discovered that the car was missing.

Imagine Bob's surprise therefore when he turned the corner of the
building and saw the car standing in its accustomed place. Heinrich was
washing it as if nothing in the world had happened.




CHAPTER X

BOB IS MYSTIFIED


Bob stopped and stared in amazement. He could scarcely believe his eyes.
There was the car that had disappeared so mysteriously the night before,
in its right place, and undamaged as far as he could see.

"Heinrich," he exclaimed in amazement.

The chauffeur, a hose in one hand, a big sponge in the other, and wearing
high rubber boots, looked up inquiringly.

"What are you doing up so early?" he asked.

"Where did the car come from?" demanded Bob.

Heinrich straightened up and gazed at Bob.

"What you mean?" he inquired.

"Who brought the car home?"

"How do I know? Maybe your father use it last night. Whoever do it, get
it all covered mit dust."

"But," stammered Bob, "the car was stolen."

"What!" exclaimed Heinrich. "What you talking about?"

"What time did you get in last night?" Bob inquired, becoming more and
more anxious and bewildered every moment.

"Twelve o'clock," said Heinrich. "What you mean the car iss stolen?"

"Was it here when you came home?"

"Certainly it was here. What you talking about?"

"I don't know," said Bob weakly, and he sat down on the running board and
passed his hand across his brow.

"Are you sick?" asked Heinrich anxiously. "You look pale."

"I'm not sick," said Bob. "I guess I'm crazy," and he held his head in
both hands, staring blankly at the floor.

Heinrich did not know what to make of the strange behavior of his
employer's son. He stared at him curiously, and it was plain to see that
he was telling the truth in all he said.

"What you mean the car iss stolen?" he inquired finally.

"Nothing," said Bob blankly. "It's too much for me."

"I go to a party last night," said Heinrich. "I come home late and the
door here iss open. Here iss the car too. Why you think it stolen?"

"I don't know," said Bob. "I guess I must have dreamt it."

"You are sick," exclaimed Heinrich. "You had better go back and go to
bed. If you wish I go with you to the house."

"No," said Bob. "I'm all right." He rose to his feet dazedly, looked in
bewilderment at the car again and started out.

"I have a loss," said Heinrich, convinced that Bob was probably
all right.

"What's that?" demanded Bob, turning around.

"Burglars," said Heinrich.

"Where? In the garage here?"

"Yes. Last night," and Heinrich brushed a tear from his eye.

"You did?" exclaimed Bob. "They didn't steal all that money you had
yesterday, did they?"

"No," said Heinrich sorrowfully. "I almost wish they had. They
steal Percy."

"Percy," cried Bob, greatly relieved. "Why should any one steal him?"

"I do not know. I come down this morning and I look in the tub to say
good-morning to Percy. The tub iss here, but Percy iss gone."

"There are some queer things going on around here, Heinie," said Bob.

"I like to catch the man what steal him," said Heinrich fiercely.

"I'd like to catch lots of people," said Bob. "Maybe he fell out
of the tub."

"He could not do that," exclaimed Heinrich. "The sides iss too high."

"Well, it's certainly strange." Bob went out of the garage and started
slowly back toward the house. Heinrich, sorrowing over the loss of his
alligator, with a sigh took up the sponge and hose again and fell to
washing the car once more.

Bob returned to his room, washed his face and hands, something he had
neglected to do before, and went downstairs again. He glanced at the
morning newspaper, full of war news and preparations for war; one
column told of the arrest of many Germans all over the country, men who
were suspected of caring more for the Fatherland than they did for the
United States.

There was no mention of the bomb episode on the railroad bridge the night
before, however. Bob knew that the authorities would not permit the
publication of any such items if they could prevent it so he was not
surprised. Presently the rest of the family appeared and they went in to
breakfast.

Mr. Cook's mail was lying on the table by his plate; it was his custom
every morning to glance it over while he was eating. While Mrs. Cook
talked to Bob about Harold, her husband looked through his letters.
Suddenly he uttered an exclamation of surprise. "Here's a queer
thing," he said.

"What?" demanded Mrs. Cook anxiously. She had been very nervous lately.

"This postcard," said Mr. Cook. "Listen to what it says. 'Take the advice
of one who knows and keep your automobile home at night.'"

Bob turned pale. "What does it mean!" inquired Mrs. Cook.

"I'm sure I don't know," said her husband.

"How is it signed?"

"It is not signed at all."

"I can't imagine what it's all about," said Mr. Cook. "As far as I know,
our car hasn't been out of the garage at night for over a week."

"Perhaps Heinrich has had it out," Mrs. Cook suggested.

"I'll ask him right after breakfast," said Mr. Cook. "They must have
mistaken our car for some one else's."

"Who do you suppose sent it?"

"I'm sure I don't know," said her husband musingly. "At any rate I think
I shall turn it over to the police; I don't like the look of it."

Throughout this conversation Bob sat silent. He thought perhaps he could
explain part of the mystery to his father, but he was puzzled as to
whether he ought to do so or not. On the other hand if his father called
in the police, he knew that he and Hugh would have small chance of
clearing up the matter themselves.

"It worries me so, Robert," exclaimed Mrs. Cook. "I am so afraid that
something will happen to you, especially as you are making war supplies
at the factory now."

"The plant is guarded," said her husband. "Besides I think I owe it to my
country to help all I can, don't you?"

"Of course, but suppose some of your guards are treacherous."

"They are all trusted employees of American birth."

"No Germans at all?"

"The man in charge at night has parents born in Germany; you know him,
Karl Hoffmann, the one who wants to marry Lena. He is just as faithful
and true as she is. I can vouch for all the others as well."

"He's all right I guess," said Mrs. Cook with a smile. "Even if Heinrich
doesn't like him." Heinrich and Karl Hoffmann were rivals for Lena's
affections, and they despised each other. Lena, however, seemed to like
them both equally well, or at least she did not care enough about either
to marry him.

Bob used to delight in teasing Heinrich about his rival. When Karl was on
the premises Heinrich would sulk in the garage and mutter threats against
him. Karl was twice Heinrich's size, but the little blue-eyed, spectacled
chauffeur never seemed to question his ability to deal with him.

Mr. Cook rose from the table. "I'll go down and ask Heinrich about this
car business," he said, "and then I'll go down to the office." He kissed
Mrs. Cook and Louise and left the room. Bob followed him out. His father
put on his coat and hat and stepped out onto the front porch. A sudden
resolution seized Bob.

"Father," he said.

"What is it, Bob?" asked Mr. Cook, turning to glance at his son.

"I think I can explain about the car."

"You can?" exclaimed his father in surprise, looking curiously at Bob's
pale face.

"Yes, sir," said Bob, nervously. "It's a sort of a long story. Shall I
tell it all?"

"Certainly. Come out here to the summer house."

They walked in silence to the little rustic house on the lawn and sat
down side by side on the rough wooden seat. Bob was excited, but still
determined that the best thing for him to do was to tell his father the
whole story. He knew his father would understand and see things from his
point of view; they were more like two brothers than a father and son.

"Hugh and I had the car out last night," said Bob, and then he began at
the beginning and related the entire story through to the end. He told of
their visit to the armory, their meeting with Harold on the bridge, the
narrow escape with the bomb, their decision to watch the Wernbergs'
house, their trip to the deserted house, the disappearance of the
automobile, and finally its strange return.

Mr. Cook listened intently throughout the whole narrative, one
exclamation as Bob told of the bomb episode being his sole interruption.

"That card must have been sent by the one that brought the car
back," said Bob.

"It would seem so," his father agreed, and fell silent, thinking.

"That was a close call you boys had with that bomb," he said finally.

"Yes, sir," said Bob.

"What have you planned to do to-day?"

"We were going to report the loss of the car to police headquarters and
then go out to the deserted house again, to see what we could find."

"You weren't going to say anything to the police about it?"

"No, sir."

"That might be dangerous, you know."

"Yes, sir," said Bob. "We wanted to solve the thing ourselves if we
could though."

"I don't know about that," said Mr. Cook musingly. "I hate to
think of you two boys fooling around out there with a lot of
desperate men around."

"Don't do anything until this afternoon anyway," Bob pleaded.

Mr. Cook thought for a minute. "All right," he agreed. "Ill wait until
after luncheon. Do you and Hugh expect to go out there this morning?"

"Yes, sir."

"Have you got a gun?"

"No, we haven't."

"Well, there's an automatic pistol and two boxes of cartridges in the
second drawer of my bureau. Go up and get them before you start, for I
think you ought to be armed. And above all don't say anything about it to
your mother."

"Certainly not," exclaimed Bob, much excited that his father was
helping them.

"Be careful," warned his father. "I'll be home for luncheon and we'll
talk more then."

Heinrich appeared with the car and Mr. Cook got in and was soon on the
way to his office. Bob hurried into the house to telephone to Hugh and
possess himself of his father's automatic pistol.

Hugh promised to hurry over as fast as he could, and he could tell from
the tone of Bob's voice that something stirring was on foot. Bob had
answered his question about the car evasively and he was anxious to hear
the latest developments. Consequently by the time that Bob had tucked the
pistol safely in his back pocket and had gone to the garage for his
bicycle, Hugh appeared.

Bob related the story of the car and its strange return, and also told
about the postal card his father had received that morning. The mystery
seemed to deepen rather than clear up, and both boys were profoundly
mystified by the strange events of the previous day.

"Your eye's better anyway," remarked Hugh.

"Yes," said Bob. "But I may get another one to-day."

"We'll hope not. When do you want to start?''

"Right away."

"Come ahead then," and jumping on their bicycles the two boys pedalled
out of the yard. Little did they dream that bright April morning, as they
rode along, that they were headed for adventures which would make the
events that had gone before appear mild in comparison.




CHAPTER XI

THE DESERTED HOUSE


"Somebody stole Percy," said Bob when they had ridden a little way.

"The alligator?"

"Yes. Heinrich's pet, you know."

"Why should any one want to do that?"

"I can't imagine, and poor old Heinie is all broken up about it. I've
never seen any one who liked animals as much as he does."

"Who do you suppose did it?"

"I've no idea. Perhaps the man who returned the car stole him and is
planning to wait until he grows big and then train him to come and bite
us," laughed Bob.

"Let's hope not," smiled Hugh. "There are too many strange things going
on for me to understand just now. My brain is all mixed up."

"And so's mine. I should like to know who sent that postal card though."

"Perhaps we'll get on the trail of it when we get to the deserted house."

"Do you suppose we can break in?"

"Perhaps we can. I've brought an electric flashlight along that may come
in handy."

"A good idea," exclaimed Bob. "I have an idea myself."

"What's that?"

"We'd better not ride too far down the road. Let's leave our wheels this
side of the hill, and then go across the country and come in to the
house from the back. In that way I think we'll stand less chance of
being seen."

"Probably you're right. At any rate I hope no one steals our bicycles."

"I wonder if they'd be returned," said Bob. "Wasn't that a queer thing?"

"It certainly was."

They rode in silence for some time and presently came within sight of the
hill of which they had been speaking. They dismounted from their
bicycles, and wheeling them by their sides started across the fields. A
hundred yards from the main road they concealed them under a clump of
bushes and then continued on their way. They walked for about a half-mile
until they saw the fringe of the woods in the middle of which stood the
deserted house.

"Bob," said Hugh suddenly. "I know who took your automobile."

"What?" exclaimed Bob. "What are you talking about?"

"I know who took your automobile."

"Who!"

"Heinrich."

Bob burst out laughing. "What are you talking about?" he demanded. "How
could Heinrich take it? Hugh, you're going crazy."

"Isn't Heinrich a German?"

"He is."

"Weren't there a lot of Germans meeting out here in the old house
last night?"

"We think so. I still don't see what that has to do with Heinie."

"How do you know Heinrich wasn't here?" asked Hugh.

"You mean that Heinrich is a plotter?" exclaimed Bob, suddenly realizing
what his friend was driving at.

"He might bear watching," said Hugh. "He and that German cook of yours."

"They're both honest and reliable," exclaimed Bob warmly.

"Well," said Hugh, "I heard a story last night about two men coming to a
house where they had a nice 'honest and reliable' German girl and
demanding to see her. The owner of the house refused, and the men then
showed secret service badges. Of course when he saw the badges he had to
do as they said and he called in the girl. As soon as she came into the
room one of the men went up to her and grabbed hold of her hair. Well,
sir, it came right off her head and then they discovered that the maid
was nothing more nor less than a man, a German in disguise, trying to get
information for his government."

"Is that a true story?" exclaimed Bob in amazement.

"The man in whose house it happened told it to father," said Hugh. "It
only goes to show that you can't be too careful. I wouldn't be too sure
about Heinrich and Lena if I were you. The Germans are a bad lot and I
suspect them all."

"Perhaps," said Bob. "Still Heinie and Lena are different."

"They may be tools of Mr. Wernberg for all you know."

"You're foolish," exclaimed Bob. "Why even if they weren't loyal to the
United States they'd be loyal to father and mother. I know that."

Hugh shrugged his shoulders. "It sounds fishy to me, that's all," he
said. "Didn't Heinrich say he went to a party last night? How do you know
the party wasn't held out here, and that he just happened to run across
your car and decided to bring it home."

"If he had he would have washed the car last night, not this morning."

"Why so?"

"Because he's so methodical, like all the Germans. He never could have
slept if he had known the car was dirty."

"Why, Bob," Hugh protested, "Heinrich says he didn't come in until twelve
o'clock and he says the car was there then. Why didn't he notice that it
was dirty then? I'd like to know."

"He probably didn't light but one light in the garage and didn't
notice it."

"Sounds likely," snorted Hugh. "Take my advice and watch 'em both."

"They're just as faithful as you or I," exclaimed Bob. "You can't talk me
into getting suspicious of those two."

"The faithful ones are the ones to suspect," said Hugh grimly.

"Nonsense," said Bob, but his friend's words nevertheless set him to
thinking. What if Heinrich and Lena should turn out to be working in the
interests of Germany? He recalled the light in Lena's room the night
before, and then he thought of all the money Heinrich had had and how
embarrassed and uneasy he had been when Bob spoke of it. Ugly stories of
Germans crowded through his mind, but he refused to believe that their
two servants were of that sort.

Presently they reached the edge of the woods. The wagon road they had
followed the night before ran all the way through the stretch and a
break in the trees a short distance away showed where it came out on
that side.

"We must go carefully now," warned Hugh. "How far in is the old house?"

"Oh, about a quarter of a mile," said Bob. "I don't believe any one is
apt to be out here in the daytime." He felt for his back pocket, however,
and the knowledge that he had a revolver with him was most reassuring.

They stole along through the woods, stepping softly and keeping a sharp
lookout in all directions. All was silent, however, and seemingly they
were alone. Before long they were able to glimpse the old deserted house
through the trees. They stopped and gazed at it intently.

It was two stories high and of wood. Years had evidently passed since any
one had lived there and the house was in need of repairing. Some of the
shutters were missing, others sagged or were hanging limply from the
frames, the glass in most of the windows was broken, and the wind and
weather had stripped practically all the paint from the sides of the
abandoned dwelling. The cellar door was missing and all in all the place
presented a forlorn and desolate appearance. Hugh and Bob both recalled
tales of ghosts connected with the old house, and somehow now that they
were there they wished they had stayed at home.

"Perhaps we ought to report this business to the police after all,"
whispered Hugh.

"Yes," said Bob. "Still I'd hate to go home and tell father that we
didn't even go inside the place."

"That's true," Hugh agreed. "What shall we do?"

"Let's walk around it and see if we can see anything suspicious."

"All right. We'd better keep in the shelter of the woods though."

"Oh, yes, of course."

Remaining almost a hundred feet distant from the little clearing, in the
center of which stood the house, the boys began to walk. Save for an
occasional nervous glance about them they never took their eyes off the
deserted dwelling. When they came to the wagon-road they darted across
quickly, fearful lest they should be discovered. Their progress was slow
and an hour had elapsed when they returned to their starting point.

"I don't believe any one is there," whispered Bob.

"It doesn't look so. Shall we go in?"

"I suppose so," said Bob, though it was plain to be seen that neither boy
much relished the task. However they dared not go home and report failure
to Mr. Cook, so presently they ventured forth from the woods and started
across the clearing. The cellar door was open and toward this they made
their way.

A gentle breeze rattled one of the shutters, causing the boys to start
nervously. Bob kept his hand on his hip pocket and they walked closely
together. Presently they came to the cellar steps and peered in
cautiously. Their faces were pale, as gingerly they walked down the stone
steps and entered the gloomy cellar.

"Flash your light," whispered Bob.

Hugh did so, and a huge gray rat scuttled across the floor, startling the
boys so that they almost cried out. Little by little their courage
returned, however, and they advanced a few steps. They listened intently,
but no sound came to their ears. Hugh's flashlight revealed the stairs
leading to the first floor and stepping noiselessly the boys approached.

Slowly and very cautiously they ascended and presently came to the top
of the stairs. Bob was in the lead, his pistol gripped tightly in one
hand. With his free hand he pushed the door open gently and looked
within. The kitchen was deserted, a broken-down stove in one corner, a
water heater covered with dirt and rust, a sagging sink, and two
battered chairs and a table completing the furnishings. A soft breeze
entered through a broken window and gently stirred the strip of wall
paper hanging limply from the ceiling.

Bob beckoned to Hugh and they emerged into the room. They listened
intently. Not a sound was to be heard. Reassured they passed out of the
kitchen through a narrow back hall, and into the parlor. The same aspect
of neglect and decay was everywhere evident, but nothing suspicious was
to be seen.

"Shall we go upstairs?" whispered Bob.

"We might as well. I don't believe there's any one here anyway."

The stairs leading to the second floor creaked and groaned under the
weight of the boys, but as they were now convinced that the house was
uninhabited they were not worried. Coming to the second story they
proceeded to the room located in the front of the house.

"This must be the place," whispered Bob excitedly.

A table stood in the center of the room; around it were grouped five
seats, chairs and old boxes, as if five men had had a meeting or
conference there.

"This is where they had their meeting last night," said Hugh. "Here are
places for five men, and we saw that many come out."

"Yes, sir," echoed Bob. "This looks like headquarters."

"Suppose we could expose them," exclaimed Hugh. "Wouldn't it be great?"

"If we only could," said Bob eagerly. "Let's look around."

Pen and ink, together with a pad of writing paper were lying on the
table. Besides the table and seats, however, there was no furniture in
the room, and there seemed small promise of anything of interest to the
two searchers. They lifted every box and searched under it, but all in
vain. Finally Bob looked behind the door. With an exclamation of delight
he stooped and picked up a piece of paper lying upon the floor.

"What is it, Bob?" inquired Hugh eagerly.

"I don't know. I can't see very well."

"Bring it over here by the window. It's awfully dark and gloomy in
this room."

Bob followed this suggestion, and presently was reading what was written
on the paper. Hugh looked on over his shoulder.

"'List of places to be attacked.'" Bob read. "'Railroad bridge, Court
House, Armory, National Cartridge Company, High Ridge Steel Company. More
to be added later.'"

"This looks like the real thing," exclaimed Bob excitedly. "I wonder if
they plan to take these in order. At any rate we fooled them once on the
railroad bridge."

"Yes," said Hugh, "and we want to fool them on the others if we can."

"They've got father's factory listed," exclaimed Bob. "I was afraid they
would; the Germans don't like him. He's too good an American."

"Some one must have dropped that paper by mistake," said Hugh. "They
never would have left anything like that lying around."

"Suppose they discover they've left it and come back after it."

Both boys looked nervously out of the window, but all they saw was
the little clearing and the quiet trees, swaying gently under the
light breeze.

"Isn't it signed?" asked Hugh.

"No."

"Look on the back; there may be something there."

Bob turned over the sheet of paper. "No writing," he said. "There's a
picture here though."

"What is it?"

"I can't see very well. It looks like some sort of a bug."

"It looks like an alligator," said Hugh, taking the paper from Bob and
examining it closely.

"Let me see," exclaimed Bob. "That's what it is," he announced a moment
later. "What do you suppose is the idea of that?"

"I'm sure I don't know. Probably some man was just trying to amuse
himself by drawing pictures, and happened to draw an alligator."

"Maybe it's a picture of Percy," laughed Bob.

"Say," exclaimed Hugh suddenly, "it's strange, though. Heinie's
alligator was probably stolen by the man that returned the car, and
whoever returned the car was probably out here at this meeting. What's
the connection?"

"I don't believe there is any," said Bob. "You're too suspicious, Hugh."

"Won't you admit that it's queer?"

"Of course I will, but I think it also proves that Heinie couldn't have
been the one who returned our car last night. That is, if you think the
man who stole the alligator was the one who brought back the car.
Heinrich wouldn't cry about the loss of his pet if he was the one who
took it, would he?"

"It's too deep for one to understand," sighed Hugh with a shake of his
head. "At any rate one thing is sure and that is that some plots are
being hatched around here and--"

Before he could finish there was a loud crash behind them, the only door
leading out of the room was slammed shut, and a key turned in the lock.




CHAPTER XII

TRAPPED


Bob and Hugh stared at each other in astonishment. They had been tricked
and were now prisoners. A moment later they recovered somewhat from their
surprise and with one accord sprang for the door.

Bob seized the knob and shook it violently. To no purpose, however.

"Get a chair, Hugh," he cried. "We'll smash the door in."

"How do we know what's waiting for us in the hall?"

"I don't care. We've got to get out of here."

There was a deafening report of a gun fired in the narrow hall. The panel
of the door close to Bob's head was splintered, and a bullet shot across
the room, shivering the one remaining pane of glass left in the window.

"Duck!" shouted Hugh. "Get away from that door!"

Bob needed no second urging. He sprang aside and cowered against the
side of the wall. The two boys looked at each other, pale-lipped and
breathing hard.

"Whew," exclaimed Hugh. "That was a close call."

Bob whipped his pistol out of his pocket, and began to crawl back
toward the door.

"What are you going to do?" demanded Hugh in alarm.

"I'm going to send a bullet through there myself," said Bob. "We might
just as well let them know we're alive too."

"Don't you do it. You'll only waste your bullets and it may help us later
if they don't know we are armed."

Bob hesitated. "I guess you're right," he said a moment later, and
presently resumed his place against the wall.

"What'll we do?" said Hugh.

"I don't know. Did you hear anybody?"

"Not a soul. All I heard was the door bang and then the pistol shot."

"I guess we're in for it," said Bob nervously.

"We must get out of here."

"I think so too, but how?"

"We can smash the door."

"Yes, and the minute we stick our heads out of the door we'll get a
bullet through us. I don't see that we stand a chance."

"But we can't stay here," protested Hugh. "If we do they'll certainly fix
us one way or another."

"If I don't come home to lunch father will get worried and bring help to
us; he knows where we are."

"These people won't wait that long. If they are spies and plotters
they'll be desperate and they won't waste much time dealing with us."

"I wonder how far it is to the ground."

"We'd break a leg trying to jump," said Hugh.

"I'll look anyway," and Bob carefully raised himself to his feet and
advanced toward the window. He peered out and then suddenly uttered an
exclamation.

"Hugh," he cried in a low voice. "The gray roadster is out there. A man
just got in and is driving off."

With one bound Hugh was by his friend's side. "Could you see who it was?"
he demanded eagerly. The roadster had disappeared down the wagon road.

"I couldn't see," said Bob. "His back was toward me all the time."

"How do you suppose that car got in here without our hearing it?"

"I don't know. Of course they had the cutout closed."

"Do you think that man has gone for help?"

"I wouldn't be surprised."

"Then now is our chance to get out of here."

"Perhaps he left a guard."

"I can't help it. At any rate we'll never have a better opportunity
than this."

"Shall we smash the door in with a chair?" asked Bob.

"I don't see what else we can do."

"It's a chance."

"Of course it is, but it's no bigger chance than it is to stay here."

"All right then," said Bob. "Let's each get a chair."

They possessed themselves of chairs and then took their places one on
each side of the door. They held the chairs by the backs and prepared to
swing them against the panels.

"One, two, three," counted Bob, and smote the door with all the
strength he could muster. A second later Hugh followed suit. The door
was made of heavy oak, however, and stood fast. Bob and Hugh shrank
back against the wall and waited for any result of their efforts.
Silence pervaded the house.

"I guess that man was the only one here," said Hugh.

"It seems so; let's try it again."

Once more the chairs crashed against the door, but without effect. Again
and again the two boys exerted themselves to the utmost, but the sole
result of their efforts was to break the chairs. Finally, well-nigh
exhausted, they stopped.

"It's no use, Bob," panted Hugh. "The door is stronger than the chairs."

"We've got to get out of here though."

"The only way I can see is the window."

"But we can't jump that far; we'd only break a leg or something. There
isn't even a roof to help us."

"Can't we make a rope out of our clothes and slide down?"

"I say to try the door again," exclaimed Bob.

"But we can't smash it with these chairs," Hugh protested.

"I know it; let's try the table."

"How are you going to do that?"

"I'll show you," said Bob. "Take hold of this end with me."

They grasped the table and dragged it to a spot directly in front of the
door and eight or ten feet distant from it. "Now," exclaimed Bob. "When I
say, 'three,' we'll push it with all our might against the door."

"It'll never work," said Hugh, with a shake of his head.

"Try it," cried Bob. "We've got to do something."

They took firm hold of the table and set themselves. "Now," said Bob.
"One, two, three." They pushed with all their strength and a moment later
the table crashed into the door. The door creaked and groaned but did
not give way.

"It won't work," said Hugh with great conviction.

"Yes, it will too," exclaimed Bob. "Stick to it."

They dragged the table back and once again drove it hurtling against the
door. This time their efforts met with some success for the corner of the
table drove straight through one of the panels.

"See that?" cried Bob excitedly. "I believe that if I put my hand through
that opening I can reach the key and unlock the door."

"You don't suppose for a second that that man left the key in the
door, do you?"

"I don't suppose he did," admitted Bob, somewhat crestfallen. "Still
there's no harm in trying anyway."

"There may be somebody on guard in the hall."

"We'll have to risk that." Bob thrust his arm through the opening made in
the door panel, but soon withdrew it. "The key is not there," he said.

"Of course not," exclaimed Hugh. "Get out of the way and let me get a few
whacks at that panel with the chair." He attacked the door furiously and
in a few moments had knocked out the panel completely.

"I guess we can squeeze through there now," he said.

"Let me go first," exclaimed Bob. "I've got a gun."

He squirmed through the opening in the door and seeing no sign of any one
outside called to Hugh to follow him. A moment later they stood side by
side in the dark and narrow hallway.

"We'd better get out of here as fast as we can," whispered Bob.

"The sooner it is, the better I'm pleased," returned Hugh grimly.

They stole along the hall, every sense alert. Presently they came to
the head of the stairs and discovering nothing to alarm them, started
down. The stairs still creaked and groaned, but the boys' confidence
was rapidly returning as they neared outdoors and safety, and they
hurried along.

A side door stood open and toward this they made their way. Bob had
returned his revolver to his pocket for he really thought he should not
need it any more. He stepped out of the doorway and started down the
steps. As he did so a man sprang at him and with a blackjack dealt him a
stunning blow over the head. Bob reeled uncertainly for an instant, and
then sank unconscious to the floor; there he lay in a limp heap.

Before the man could deal with Bob's companion, Hugh had grappled with
him, and a moment later they were rolling over and over on the ground
fighting like wild cats.




CHAPTER XIII

MISTAKEN IDENTITY


Hugh had seized the man by his right wrist and as they went down the
blackjack was sent spinning. It was man to man, bare hands for weapons.

Hugh's assailant was not large, but he was extremely agile. He squirmed
and wriggled, kicked and butted, in fact he used every weapon at his
command. Hugh probably outweighed his enemy, and in addition was a
splendid wrestler, but he was young and his antagonist's strength was
more developed.

Each fighter struggled desperately to get an arm free. Once Hugh
succeeded, but it was his left arm, and when he seized his opponent's
throat his hold was soon shaken loose. They fought fiercely, both
breathing hard, their faces were red and blotched, and their eyes were
staring. Over and over they rolled, the stones and twigs on the ground
tearing and lacerating their hands and faces.

Hugh got hold of his opponent's right arm. He bent it back with every bit
of strength he possessed, until the man cried out in pain. Hugh knew,
however, that he would receive no mercy if he was overcome and he pressed
home his advantage. Suddenly, with a convulsive twist of his body, the
man shook loose Hugh's hold, and dealt him a heavy blow in the chest.
Hugh felt his wind badly shaken and he seized his opponent around the
waist with both arms, squeezing with all the strength in his body. His
one idea was to keep as close to his enemy as he could, so that the man
would have no opportunity to strike him again.

Gradually Hugh felt his strength slipping. He knew he could not hold out
much longer, and even as he struggled he wondered how soon it would be
before the other Germans returned and made an end of him. Then when he
least expected it, help came to him.

Bob had opened his eyes after a moment. He had seen millions of stars,
and as he came to his senses again his head felt sore and battered. He
did not recall for a moment just what had befallen him. Suddenly,
however, he heard the sounds of a violent struggle being waged near at
hand, and sitting up he spied Hugh and his assailant locked in each
other's grasp, and still fighting. Bob sprang to his feet and
approached them.

He remembered everything now. His throbbing head recalled to him the blow
he had received and he could feel a large lump on the back of it. He
wondered what would have happened to him if he had not worn a hat. A
moment later, however, he had dismissed from his mind all thought of
himself and was engaged in assisting his friend.

He grasped Hugh's assailant by his throat and knelt on his shoulders
with both knees. Gradually the man's strength waned; Hugh could feel
it slipping. A moment later he lay gasping on the ground too weak to
offer any resistance to the two boys. Hugh held his arms, while Bob
released his hold on the man's throat and sat on his legs. The
prisoner, his breath rattling in his chest, lay with eyes half-closed,
completely done up.

Suddenly Hugh spied something that made him start violently. The man's
coat lay wide open and pinned on his vest was a badge. More than that, it
was a police badge, one of the badges of the police of High Ridge.

"Bob," gasped Hugh in alarm, "this man's a detective."

"What!" cried Bob. "You're crazy."

"I am not. Look here."

He released his hold on his erstwhile opponent and stood up. Bob followed
suit. In amazement they looked at the man on the ground at their feet.

"That's a High Ridge police badge all right," said Bob. "No doubt of
it."

"Are you a detective?" Hugh asked their victim.

The man looked at them through narrowed eyelids. "Yes," he said weakly,
and started to reach towards his hip pocket.

"Here, here!" cried Hugh. "None of that! This whole thing is a mistake."

"Let me help you up," urged Bob, offering his hand to the beaten man.
Hugh also assisted him and they raised him to his feet.

"I guess we were after the same people you were," exclaimed Bob, taking
it for granted that the detective had trailed the Germans to the deserted
house as he and Hugh had done. "They had us locked up in there and we had
just broken down the door and were coming out. We didn't know you were a
detective."

"You didn't give us a chance to find out," laughed Hugh, greatly relieved
at the unexpected turn of events. He also felt safer to have an officer
of the law with them.

The detective rubbed his neck, and looked at the two boys narrowly.

"Germans in this house?" he said at length.

"They had a meeting here last night," said Bob.

"How do you know?"

"We followed them out here. Look at this too," and he handed over the
list of buildings to be destroyed that they had found in the old house.

The detective snatched the paper out of his hand and scanned it eagerly.

"Where did you get this?" he demanded.

"We found it upstairs," said Bob.

"Humph," ejaculated the detective and thrust it into his pocket.

"Weren't you trailing these Germans too?" inquired Bob.

"How do you know they were Germans?"

"Who else would want to blow up bridges and ammunition factories?"

"Did they intend to do that?"

"That's what that list says," exclaimed Hugh, nettled by the questions
the man asked as well as by his odd behavior.

"Well," said the detective, "you take my advice. This is no place for a
couple of boys like you to be hanging around. You might get hurt the
first thing you know." He glanced about him nervously as though he
expected some one else to arrive upon the scene at any moment.

"A man locked us in that room just before you arrived," said Bob. "Then
he dashed off in a big gray roadster."

"Well, you'd better get out of here yourselves," said the
detective shortly.

"They may come back at any minute and perhaps you'll need help,"
protested Bob.

"I'll take care of that part of it," exclaimed the detective. "You get
out."

Convinced that there was nothing else for them to do, Bob and Hugh
started off through the woods, leaving the detective in undisputed
possession of the premises. They were greatly puzzled by their recent
experience.

"What do you think of that detective?" demanded Bob, when they had
reached a point out of sight of the house.

"I think he was an old grouch," exclaimed Hugh. "I don't see why he had
to be so disagreeable to us; all we wanted to do was to help him."

"Yes, when those Germans come back he's apt to be handled roughly."

"He was jealous of us, I believe," said Bob.

"Why so?"

"Well, we had gone ahead on our own account, and from the way he acted I
guess we knew more about what was going on than he did."

"Perhaps that's it," said Hugh. "Maybe he was afraid we might take some
glory away from him."

"How silly!" exclaimed Bob. "What do we want with glory?"

"We'd better tell your father what happened this morning."

"Of course. He'll think I'm a pretty poor fighter though; a black eye
one day and a big lump on my head the next."

"How does your head feel anyway?" inquired Hugh.

"Oh, pretty well. It still throbs though."

"I should think it might, and you can consider yourself pretty lucky that
you didn't get your skull cracked open."

"He was a queer looking man, wasn't he?"

"Yes, and his actions were even queerer."

"I guess he was jealous," said Bob. "Oh, well, I don't suppose it makes
any difference who corners those Germans, so long as somebody does it."

"Personally, I'm sort of glad to get away from that house," said Hugh. "I
believe that if we had stayed much longer we never would have left."

"How about the detective?"

"If he wants to stay that's his lookout, not ours."

"That's right, and I suppose he'll go for help anyway."

"Perhaps they'll just watch the house for a day or two," said Hugh. "It
may be though that now that those Germans know they are watched they may
meet in some other place."

"True enough. I wish we could find the place."

Presently they came to the spot where they had left their bicycles. They
were still there, and a moment later the boys were wheeling them back
across the field again. Once more in the road, they mounted and soon were
riding towards home. Their minds were busy with plots and Germans and the
recent experiences they had undergone. They felt sure that they were on
the trail of a desperate gang, and that quick action perhaps was
necessary to prevent untold damage, and possible loss of life.

They were confused, however. Everywhere they turned they seemed to run
into some new angle of the affair, or some other person who might bear
watching. Hugh was still of the opinion that Heinrich and Lena should
be looked after pretty carefully, though Bob laughed at him. He knew
his family felt that their servants could be relied upon absolutely.
Bob wondered about his father's plant; was it properly guarded? Perhaps
his father might consent to let him go down there and help watch over
it at night.

Talking but little they spun along the road. Each boy was occupied with
his own thoughts, and consequently did not notice an automobile rapidly
approaching down the road.

"Here comes a car," exclaimed Bob suddenly. They swung over to the right
side of the road to let it pass, and a moment later it roared past them
in a cloud of dust.

"Bob," cried Hugh excitedly. "The gray roadster."

"I know it. Did you see who was in it?"

"I didn't notice."

"Mr. Wernberg."

"What!"

"It certainly was."

"I guess your father was right about him then. He said he was a dangerous
man, and I guess he is, if he's mixed up with that gang out there."

"Well, Frank wouldn't talk the way he does unless he'd heard it at home."

"Probably not. Do you suppose they recognized us?"

"Suppose they did?" said Bob, carelessly. "We have a right to the road,
haven't we?"

"Certainly, but the man who locked us in the room! He must have been in
the car and would surely recognize us as the ones who were in the house."

"That's true," exclaimed Bob. "Do you think they'll turn around and come
after us?"

Hugh glanced back over his shoulder. "The car has stopped," he exclaimed.
"Come on, Bob, we'd better ride for all there is in us."

The two boys leaned forward on their pedals, bent low over the
handlebars, and rode as hard as they could. They were not far from the
town now and they knew that the occupants of the gray roadster would not
dare molest them, when once they had gained the populated districts. Not
once did they look back until they were safely within the city limits.

"I didn't think they'd follow us," puffed Hugh. "Still it's just as well
to take no chances."

"I wasn't so much afraid of them chasing us," said Bob. "What worries me
is that probably they know who we are now, and consequently we won't be
safe no matter where we are."

"I guess we'll have to report to the police."

"If we do I hope they treat us better than that detective did."

"I hope so, too," laughed Hugh. "At any rate we'll ask your father."

"You are coming to our house for luncheon, you know."

"Yes."

"We can talk it over with father then."

They arrived at the Cook residence without further adventure or mishap.
They left their bicycles in the garage, and then started for the house.
Half-way across the lawn they met Mr. Cook.

"Well, boys," he said, plainly relieved at seeing them safely back,
"what luck?"

"Feel my head," said Bob, removing his cap.

Mr. Cook did so. "Whew!" he exclaimed. "Where did you get that?"

Bob related the story of their experiences that morning. Mr. Cook offered
no comment until he had finished. "This looks serious," he said at
length. "It's too bad you got such a bump from a detective, a man on your
own side."

"What do you think of our seeing Mr. Wernberg?" asked Hugh.

Mr. Cook's face clouded and he shook his head. "I was afraid of
him," he said.

"What shall we do about it?" Bob inquired.

"I think we'd better report it to the police, and do it soon, too." He
looked at his watch. "We've got time before luncheon," he exclaimed. "Was
Heinrich in the garage?"

"No, sir."

"How about the car?"

"That's there all right."

"Well, come along then," exclaimed Mr. Cook. "We'll get it and go
straight down to police headquarters now."

"Don't you think our friend the detective will make a report?"
asked Hugh.

"Possibly. Still, as Bob says, those men are sometimes very jealous and
he might not tell the whole story, particularly about what you did."

A few moments later all three were on their way to the police station.
Bob's old friend, Sergeant Riley, was still behind the desk and gave them
a jovial greeting.

"Yez haven't got no Germans for me, have yez?" he demanded.

"No," said Mr. Cook, "we haven't, but we can tell you where to get some."

"Sounds interesting," said the sergeant laying aside his pen and
carefully blotting the sheet of paper on which he had been writing. "Tell
me about it."

"Go ahead, Bob," his father urged. "Tell your story, and first of all let
Sergeant Riley feel the bump on your head. That'll convince him."

"It would indade," exclaimed the sergeant, after examining the swelling
on Bob's head. "Not that I'd ever doubt anything a son of yours told me,
Misther Cook."

Bob related the events of that day to Sergeant Riley. The police officer
listened attentively and interestedly until Bob came to the part about
the detective. As he began to tell of that the sergeant started
perceptibly.

"A detective, yez said?" he demanded.

"Yes," said Bob, "he had a badge on."

"Can yez describe him?"

"Well," said Bob, "he was a man about five feet seven inches tall; he had
dark hair and a close-cut black mustache. I should think he would weigh
possibly about a hundred and fifty pounds; maybe not quite so much. He
had on a soft brown hat and a dark suit of clothes. I can't remember
anything more about him."

"That's a plenty," exclaimed the sergeant. He had been jotting down the
description of the detective as Bob spoke.

"He was a grouchy fellow all right," exclaimed Hugh. "He chased us away
from there as though he was jealous of us and didn't want us around."

"I daresay he didn't want yez," said Riley.

"What's his name?" asked Bob.

"I don't know," replied the sergeant.

"Come on, Riley," laughed Mr. Cook, "you can't tell me that. Why I
thought you knew every one in High Ridge to say nothing of your own
force. You don't mean to tell me you don't know a detective that wears
the same badge you do?"

"Yes, sir, I do," said Riley soberly. "And I'll tell yez why. That man
these boys met this morning is no detective at all."




CHAPTER XIV

AN EXPEDITION


Mr. Cook and the two boys were so completely taken aback by the
sergeant's statement that for a moment all they could do was stare at one
another in amazement. Bob was the first to regain his voice.

"What do you mean, Sergeant?" he demanded.

"Just what I say."

"That man was not a detective?" stammered Bob. "He is not a member of the
High Ridge force?"

"There is no man answering to that description here."

"Then he was a fake."

"Exactly."

"Well," exclaimed Hugh, Bob, and Mr. Cook in one breath. They could
say no more.

"He was a fake," repeated Sergeant Riley emphatically. "There is no
doubt of it."

The boys were too surprised for words. What kind of a business was this
they were becoming involved in anyway? The further they went the more
confused they became. If you could not trust a man with a regulation
police badge, whom could you trust?

"It seems incredible," said Mr. Cook.

"We are at war with Germany, aren't we?" asked Sergeant Riley calmly.

"We are," Mr. Cook agreed.

"Well, then," said the sergeant, "that explains it. They want to do us
all the harm they can and as they can't bring soldiers over here, thanks
to the English fleet, they've got to strike at us with plots and bombs
and such things. They will stop at nothing."

"Are there many to guard against in High Ridge?" asked Mr. Cook. "You
know I am interested because my factory is making ammunition for the
Government."

"There are several," the sergeant admitted.

"Can you tell me who they are?"

"I cannot. 'Twould be against my orders. Yez might feel better to know
that we are watching them pretty carefully though."

"I hope so," said Mr. Cook fervently.

"Have yez had lunch?" asked the sergeant suddenly.

"No," replied Mr. Cook. "Not yet."

"Well, suppose yez go home and get it. I may telephone yez a little later
to go out to that house with some of our men."

"Good," cried Mr. Cook. "We'll hurry and you may be sure we'll be ready
any time you call on us."

They left the police station and were soon on their way home. Arriving at
the house, Hugh and Mr. Cook got out, and Bob drove the car down to the
garage. There he found Heinrich seated on a box in one corner intently
studying a sheet of paper he held in his hand.

"What you got, Heinie?" asked Bob cheerily. "A love letter!"

Heinrich looked up at Bob, a curious expression in his pale blue eyes. He
made no comment, however, and presently returned to the perusal of the
paper he held.

"What is it?" demanded Bob, impressed by the chauffeur's manner. An air
of gloom seemed to pervade the garage, even the dog, the cat, and the
parrot appeared to be affected by it. The dog stood listlessly by his
master's side, the cat walked idly up and down, and the bird failed to
greet Bob with his usual cheery "How do"; he sat limply on his perch, his
feathers ruffled, and muttered to himself.

Heinrich handed the paper to Bob. It was a sheet evidently torn from a
pad and in a large scrawling hand was written the following: "We warned
your boss to keep his car at home; now tell him to keep his son there,
too." No name was signed and Bob turned the paper over and looked at the
opposite side. A picture of an alligator was drawn there. Bob recognized
the sheet as similar to the one that he and Hugh had found in the
deserted house and the detective had taken from them; apparently it had
been torn from the same pad.

"Where did you get this, Heinie?" he demanded.

"I go up to the house to see Lena," said Heinrich. "That is maybe a
half-hour ago. I only stay there a few minutes and when I come back
here is this."

"Lying on the floor?"

"Yes."

"Have you no idea who sent it?"

"How should I?" exclaimed Heinrich.

"Somebody must have slipped in here while you were absent and left
it," said Bob. "There are queer things happening around here these
days, Heinie."

"There is," the chauffeur admitted solemnly.

"Do you mind if I keep this paper?"

"No."

Bob started out.

"You better do as that says, too," exclaimed Heinrich earnestly. "You
would not want anything to happen to you."

"I'm not afraid," said Bob soberly. "You know, Heinie," he continued,
"some people are trying to blow up things around here. Some of your
countrymen, and we can't let them do anything like that, you know."

Heinrich seemed much perturbed at this. "So?" he exclaimed his eyes wide.

"Yes," said Bob, "and it's men like you who ought to stop them. You men
who were Germans but are now Americans, could do yourselves a good turn
if you did. Some people of German blood are under suspicion nowadays and
if you showed that you were loyal to the United States it would be a good
thing for you. Not that I mean to say we are suspicious of _you_," Bob
hastened to add.

This speech of Bob's seemed to offer a new line of thought to Heinrich
who merely stared at Bob and said nothing.

"Heinrich is so loyal himself that it never occurred to him that any one
would be suspicious," thought Bob as he hurried off toward the house, the
strange paper clutched tightly in one hand.

He arrived to find every one at the dining-table, and consequently he
said nothing about the warning, for he did not wish to alarm his mother.
She had just heard from Harold; his company had been ordered away from
High Ridge that morning for an unknown destination. She was worried
enough over that without having another son on her mind. Fortunately the
lump on Bob's head was covered by his hair so that it was not noticeable
enough to draw attention to it. His black eye already had been explained.

Luncheon was hardly over when the telephone summoned Mr. Cook. Sergeant
Riley was on the wire inquiring if Mr. Cook and Bob and Hugh could not
meet him at headquarters immediately. A few moments later they were in
the car and on their way down the street. Bob was at the wheel.

Another car was drawn up alongside the curb in front of the police
station and in it were four plain-clothes men. Sergeant Riley was there
to explain that they planned to go out to the deserted house and search
it thoroughly, by force if necessary. He wished the two boys to go along
as guides, and he thought probably Mr. Cook would want to accompany them.

A short time later they started, Bob leading the way. As they passed Elm
Street he glanced curiously at the white stucco house, number twelve
eighty two, and wondered what had happened to the German who had
attempted to destroy the railroad bridge. Probably he now rested in jail,
awaiting trial. Then again it occurred to Bob that possibly he had been
shot; the country was at war and offenders of that kind were not dealt
lightly with at such a time.

They left the city behind and rolled along over the country road. The
three occupants of the car were silent for they did not know what might
await them at their destination. A squad of soldiers out on a hike passed
them. They were hot, dirty and dusty, but their rifles glinted wickedly
in the light of the afternoon sun.

"They look like business," remarked Mr. Cook.

"They certainly do," exclaimed Bob. "I wish I was one of them."

"If the war lasts long enough maybe you will be."

"The United States can certainly raise a big army."

"Indeed it can," his father agreed. "Germany thought they'd have nothing
to fear from us, but they'll be sadly fooled. Just think of the money and
food and equipment of all kinds we can furnish our allies; those things
are just as important as men, and we can send millions of those, too, if
they need them."

Presently they came to the spot where Bob and Hugh had dismounted from
their bicycles that morning. Bob stopped the car and the plain-clothes
detectives followed suit. Sergeant Riley took charge.

"You lead the way," he said to Bob. "We'll follow wherever you go."

A moment later they were off across the field and soon came to the woods
which sheltered the deserted house. In Indian file they commenced to
pick their path among the trees and underbrush. Complete silence was
maintained and the party advanced, ready for any emergency. Of course the
detectives were armed. Mr. Cook carried his pistol, so Bob and Hugh were
the only ones not provided with some means of defense.

In the course of perhaps fifteen minutes Bob, from his position in the
lead, caught a glimpse of the old house through the trees. So far as
he could see there was no sign of life around it anywhere. He held up
his hand and the little party came to a halt. A whispered consultation
was held and it was decided to spread out somewhat and move forward in
open order.

The plan was to advance until they reached the border of the trees, and
then at a given signal rush out into the opening and surround the house.
Stealthily the band stole forward. The spring air was soft and balmy, the
buds on the trees were commencing to swell; everywhere nature gave signs
of a reawakening, but these things passed unnoticed. The members of the
little party were occupied with the business in hand, and had no time or
interest for anything else.

Soon they reached their appointed positions. From the spot where he
crouched Bob could see the others lurking within the shelter of the
trees. He could see Sergeant Riley raising a police whistle to his lips
to sound the signal that had been agreed upon. Bob set himself. He had
been advised that inasmuch as he was unarmed he should remain behind, but
he had no such intention. Neither had Hugh.

Suddenly Sergeant Riley sounded a shrill blast with his whistle. Every
man rushed forward. Only for a few steps, however. A burst of flame, and
a puff of smoke shot from the cellar window of the old house, and the air
was rent by a terrific explosion.




CHAPTER XV

FIRE


Staggered, the men all stopped short in their tracks. An instant later
there was a second explosion. There was a ripping, splitting sound, and
the whole side of the building fell out. The air was filled with bits of
wood and plaster.

"Keep away from that house!" shouted Sergeant Riley as one of his men
darted forward. "Do yez want to get killed?"

A minute later flames appeared, and the red and yellow tongues of fire
began to play around the window frames. Black smoke curled from every
opening. It was plainly to be seen that the house was doomed.

"Look!" cried Hugh suddenly. "There goes a man!"

Without waiting to see what the others were going to do he dashed off in
pursuit of a figure which could be seen scuttling away through the trees.
Two of the detectives joined in the race and one of them fired two shots
from his pistol at the fugitive. In reply the man suddenly wheeled and
shot once at his pursuers. Bob heard the bullet whine past close to his
head. He also had caught a fleeting glimpse of the man, and one look was
enough to convince him that it was the fake detective with whom he and
Hugh had struggled that morning.

A moment later the man was out of sight, Hugh and the two detectives
still after him, shouting and calling to him to halt. Meanwhile the fire
in the house roared and blazed.

"She's a goner," said Sergeant Riley. He stood beside Mr. Cook and Bob as
they watched the burning building.

"I guess she is," remarked Mr. Cook. "There's nothing we can do."

"Nothing," agreed the sergeant.

"It's not much loss anyway," said Mr. Cook.

"No loss at all," exclaimed Bob. "It's a gain if anything, for it makes
one less place for spies and plotters to meet in."

"But any evidence that might have been in there is destroyed,"
said Riley.

"I never thought of that," said Bob. "That's probably why they
burned it."

"Was that your detective running off through the woods?" asked the
sergeant.

"It certainly was," said Bob. "I guess he was one of the gang after all.
I suppose they left him behind to watch us."

"Then why did he let you get away?" his father replied.

"Probably he thought it would create less suspicion," said Sergeant
Riley. "He got the paper away from the boys and as long as he thought
he could bluff them into thinking he was a detective he thought that
was sufficient. On the other hand if he had held them prisoners or
anything like that there would have been a search for them and trouble
started at once."

"I guess that's right," said Mr. Cook soberly. "However, I hope they
catch him this time."

Suddenly a piercing scream startled them. They glanced up to see a white
face at one of the windows of the house. All around, the fire roared and
the smoke curled up in great clouds. Before they could see who the man
was he had fallen back into the room and disappeared from view.

"I'll get him," exclaimed one of the detectives, and without further
ado, he sprinted for the burning house. Paying no heed to the warning
cries of his comrades he dashed up to the back door and entered, and was
soon lost to sight.

"That feller Donovan is a dare-devil," exclaimed Sergeant Riley. "He'll
stop at nothing. Why should he risk his life for a man that's as good as
dead now?"

"He'll never come out alive," cried Mr. Cook.

"And all for a man who is plotting against the country," echoed
Riley. "Here you!" he shouted to the other plain-clothes man. "Keep
out of there. The High Ridge police force can't afford to lose more
than one man a day." The fourth detective showed signs of wishing to
follow his comrade.

"If he does rescue that man it'll only be to put him in jail," said Bob.

"Or shoot him more likely," cried Riley angrily.

Breathless they waited for any sign of Donovan. The fire burned more
fiercely every moment, and it seemed incredible that any man could enter
that seething furnace and return alive. The air was filled with sparks
and blazing embers; the smoke mounted heavenward in a thick column which
must have been visible for miles.

Minutes that seemed like hours passed. Hugh and the two detectives
returned from their chase. They had not captured their man.

"We followed him as far as the road," one of them reported. "He had a
motor cycle there and got away from us."

"We'll get him later, never fear," said Sergeant Riley, grimly.
"Meanwhile that crazy man, Donovan, is in the house here trying to rescue
some one of them German plotters that showed his face at the window."

The recipients of this piece of news gasped. "He'll never come out,"
exclaimed one of the men. "Still, he never did seem to care much for
his life."

White faced and tense they watched the conflagration. Certainly not one
of the men ever expected to see Donovan again. Yet what could they do? As
Sergeant Riley had said, it was folly for any one else to follow him in,
and so they were powerless. All they could do was watch and hope.

Suddenly a figure appeared at the door. It seemed to issue straight
from the hottest part of the fire. On its shoulder was the limp
figure of a man.

"There he is!" cried six voices together, and together the six watchers
made for the house.

Donovan, for it was he, stood on the charred steps. Sparks and blazing
firebrands fell all around him and he tottered uncertainly. Willing
helpers rushed to his assistance, but before they could reach him he
swayed and fell. He rolled down the step dropping his burden, and side by
side the two men lay on the ground. Close by, the wall threatened to fall
on them at any moment.

It did not take long to seize both men, and carry them away from danger
and a moment later they were stretched out side by side on the grass, a
safe distance from the burning building.

The man whom Donovan had rescued, had a face so blackened by smoke and
soot that he was unrecognizable. His clothes were scorched and his whole
body seared with terrible burns. He was unconscious.

"Is he still alive?" whispered Bob in a low voice.

Sergeant Riley put his hand over the wounded man's heart. "I think so,"
he said. "Get some water somebody. And look after Donovan."

"There's a spring back there in the woods," exclaimed Hugh. "I have
nothing to carry water in though."

"Take all the handkerchiefs you can get," ordered the sergeant. "Fill the
hats; you'll lose most of it on the way back, but you'll get some."

Hugh hastened to obey; with him went Bob and two of the detectives. The
spring was not far distant, and they soon were sousing the handkerchiefs
in the clear, cold water. The hats, too, were filled and those made of
felt held the water fairly well. A few moments later they were hurrying
back toward the spot where the injured man was lying.

It had been found necessary to remove the patients farther away from the
burning building, for the heat grew more intense every moment. Donovan
had so far recovered as to be sitting up. He suffered acutely from
numerous burns, but otherwise seemed to be all right. The man whom he
had rescued, however, still lay unconscious on the ground.

Sergeant Riley now took charge of the operations. He bathed Donovan's
face with one of the handkerchiefs and gave him another to suck. Mr. Cook
under Riley's instructions poured water from one of the hats upon the
other sufferer's face, and then gently sopped it with a handkerchief. As
a result of this treatment the soot and grime disappeared and presently
it was possible to distinguish his features.

Suddenly Mr. Cook started back in surprise. "Come here, Bob," he cried.
"See who this is."

One glance was enough for Bob. He recognized the man over whom his father
was working as Mr. Wernberg.




CHAPTER XVI

MORE COMPLICATIONS


"Who is he?" inquired Sergeant Riley, noting his companion's
astonishment.

"His name is Wernberg," said Mr. Cook.

"I've heard of him," said Riley grimly.

"Have you been looking for him?"

"I know his name," exclaimed the sergeant evasively.

"Well," said Mr. Cook, "he's about done for, I'm afraid. I suppose we
ought to get him to a doctor as fast as we can though."

"Yes," agreed Riley.

"I'll get our car," exclaimed Bob.

"Can you bring it in here?" asked his father.

"Yes. I'll have it here in ten minutes," and Bob set off at top speed
through the woods toward the spot where the automobile had been left.

Mr. Wernberg was still unconscious. In fact it was difficult for a time
to ascertain whether or not he was alive. More water was brought from the
spring and Mr. Cook and Riley continued to minister to the sufferer. Some
of the worst of his burns were bound up with strips of shirts offered by
members of the party, and his outer clothing was removed. As a matter of
fact a large portion of it was so burned that it crumbled to powder at a
mere touch.

"He's alive," said Sergeant Riley after a few moments.

"Then he ought to recover," exclaimed Mr. Cook. "That is, unless he has
inhaled some of the flames and injured his lungs in some way."

"Only a doctor can tell that," said the sergeant. "Whether he gets well
or not, one thing is certain and that is he'll be in the hospital a
long time."

"That's right," agreed Mr. Cook. "I wish he could talk though."

At that moment Bob arrived with the automobile and presently Mr. Wernberg
was lifted into the tonneau and a blanket wrapped around him. He was
still unconscious, but his face was drawn with pain that fortunately he
could not feel. Much as the men who cared for him despised him for his
suspected work with the gang of spies and plotters they could only feel
pity for his sufferings.

Mr. Cook, Hugh, and Sergeant Riley accompanied Bob on his trip to the
High Ridge Hospital, and the three other members of the party were left
to watch the fire and see that it did not spread, and then they were to
follow in the other car. Donovan the detective seemed to be himself once
more and related briefly the story of how he had rescued Mr. Wernberg.

"I rushed into the house," he said, "and as I stuck my head inside the
door a wave of smoke caught me full in the face. At first I expected I
should have to turn back, but I kept on and presently the air cleared for
a minute. I knew the trapped man was on the second floor so I hurried
around looking for the stairs. Finally I found them and though they were
awfully rickety I got up.

"The smoke seemed to be thicker on the second floor and I could scarcely
see. I heard a cry and followed it, stumbling and falling along the
hall. The door of one big room was smashed and the smoke poured out of
there as if it was a chimney. No one was in that room and I came out
into the hall again. I heard another call, and traced it as coming from
a room where the door was closed. I grabbed the door-knob, but it was
locked. 'Help! Help!' I heard from inside. 'Unlock the door!' I shouted.
'I have no key,' said the voice, so I put my shoulder to the door and
tried to force it.

"I was choking and coughing and gasping, what with the smoke and all, and
it was hard work standing there. I shoved with all my might though, and
all of a sudden the door gave way. I went shooting into the room and fell
right over a man stretched out on the floor. 'They blew me up,' he cried
and fainted. Well, the room was full of smoke and all around the edges
little tongues of flame were playing; the fellow had fallen to the floor
and been terribly burned. I picked him up and staggered out with him and
you know the rest."

Donovan himself was badly burned about his hands and face. Every one
knows how painful is a burn, but the detective made no complaint, in
spite of the fact that he must have been suffering agonies.

Meanwhile Bob was speeding the car back towards High Ridge. He broke all
speed laws on the way, but he had been warned that haste was imperative
if Mr. Wernberg's life was to be saved. Besides he had a police officer
in the car with him and knew that he was safe.

In an incredibly short time he pulled up in front of the hospital. Two
orderlies were summoned, and soon Mr. Wernberg, placed on a stretcher,
was being carried into the building. Once or twice his eyelids fluttered
as though he were about to regain consciousness, but he did not seem to
possess sufficient strength to accomplish that end.

Two doctors hastily took him in charge, Sergeant Riley left word that
he should be summoned the instant the patient was able to talk, and
then Bob ran the car around to police headquarters. Sergeant Riley
invited them all into his office and they discussed what their next
move should be.

A band passed by the door, several men in uniform followed behind on
their way to the city square where they were to make speeches in order
to urge more enlistments in the army and navy. Crowds of enthusiastic
people trailed the procession, and Bob could not help wondering if the
people realized that danger threatened the country from within as well
as from without.

Presently the car bearing the three detectives arrived at headquarters.
They reported that nearby farmers had come to the scene of the fire,
which was now in such condition that no harm could come from it. The
farmers had promised to watch over the smouldering ruins, for ruins were
now all that remained of the old house.

Donovan once again related his story and then went off in search of a
doctor to care for his burns.

"It's bad business, Sergeant," said Mr. Cook.

"It is," Riley agreed. "I'd like to get me hands on some of them
fellows."

"Seems queer that they should have blown up one of their own men."

"'Twas probably a mistake. Perhaps they saw us coming and were in such a
hurry that our friend Wernberg had no time to get away."

"But look here," protested Bob. "Don't you remember what Donovan said
that Mr. Wernberg said when he burst into the room?"

"He said, 'they tried to blow me up,'" quoted Mr. Cook.

"Exactly," exclaimed Bob. "Doesn't that seem queer to you?"

"He was probably left there by mistake, as the sergeant says,"
said Mr. Cook.

"But," Bob insisted, "the door was locked."

The men looked at one another blankly.

"I had forgotten that," said Sergeant Riley.

"Well," insisted Bob, "I'd like to have that part of it explained to
me. You don't suppose for a minute that Mr. Wernberg locked himself
in, do you?"

"I shouldn't think he would," Mr. Cook admitted. "But if he didn't do it,
who did? That's what I'd like to know."

"Mr. Wernberg wasn't the only man in the house, you know," said Bob.

"Who else was there?"

"Didn't Hugh and two of the detectives chase another man?"

"Yez mean the fake detective?" asked Sergeant Riley.

"I do."

"But wasn't he in the same gang? What use would it be to him to blow up
one of his own men?"

"I don't know," said Bob. "Still I don't believe that Mr. Wernberg locked
himself in and threw the key out of the window."

"Doesn't sound likely," the sergeant agreed. "I'd like to know why those
two men were enemies though. From all I can learn I should think they
were working for the same purpose. Why should that fake detective be so
eager to get that paper away from yez, and to get you boys away if he
wasn't up to something suspicious?"

"Don't ask me," exclaimed Bob. "It's too deep for me, and I get more and
more mixed up all the time."

"Well, I believe it's just as I said," continued Riley. "They were both
parts of the same crowd. There must have been evidence against them in
that house and they wanted to destroy it. Your fake detective blew it up
and Mr. Wernberg got caught in there by mistake."

"How do you explain the locked door?" asked Bob.

"I don't, but there must be some explanation for it."

"You think it was an accident, don't you?"

"I do," said Sergeant Riley firmly. "When Mr. Wernberg gets so he can
talk I'll bet he'll say the same thing."

Bob merely shrugged his shoulders. He did not think that the
sergeant's explanation was correct, but he could offer no better one
himself so he said nothing. After all it might be that in the hurry to
get away there was a mix up and Mr. Wernberg was left behind, locked in
the room. Bob had no doubt in his mind that Mr. Wernberg was a member
of a gang that was plotting against the United States. In his heart he
felt sure he was guilty.

On the other hand if the fake detective was not equally guilty he would
be surprised. Certainly no man would disguise himself in that way who
had honorable motives. Nor would any man run away as he had done, or
fire a pistol at real officers of the law unless he was engaged in some
evil doing.

How were these two men connected? That was the question that bothered
Bob. He felt that there was some connection between them, and yet why
should one of them be locked in the second story of a house while the
other one put a bomb under it and burned it up? Perhaps after all it was
as Sergeant Riley had suggested.

"Come on, boys; we'll go home," exclaimed Mr. Cook.

"Thank yez for coming with us," said Sergeant Riley, as Mr. Cook and the
two boys rose to their feet preparatory to leaving.

"Not at all," said Mr. Cook cordially. "If there is anything further we
can do to help, please call on us."

"I will," said the sergeant. "Thank yez again."

"And don't forget to let us know what Mr. Wernberg has to say."

"I won't."

They went out and got into the automobile and a few moments later were
home again.

"After you put away the car, I want you to take a note down to the
Wernbergs for me," said Mr. Cook to Bob as he mounted the steps of
the house.

"To tell them what happened to Mr. Wernberg?"

"Yes."

"I should think it would be better to go and see them."

"No doubt it would, but somehow I don't like the idea of having to go and
talk to Mrs. Wernberg about it. I suppose I'm a coward."

"I don't blame you," exclaimed Bob, and after he had returned the car to
its place in the garage he came back to the house to wait until his
father should have finished the note he was writing.

When it was ready Mr. Cook handed it to Bob, who at once started for the
Wernbergs' house, accompanied by Hugh. They discussed the recent turn of
events in the mystery and were somewhat at a loss as to what their next
move should be. Now that the old deserted house was a thing of the past
they did not know where to look for the seat of the conspiracy. They did
decide, however, that in so far as it was possible they would keep watch
on number twelve eighty-two Elm Street.

They mounted the front steps of the Wernbergs' house, and Bob advanced
toward the door bell. Before he rang it, however, he spied an envelope
lying at his feet, half concealed under the door mat. He stooped to pick
it up, and as he glanced at it he uttered an exclamation of surprise.

"Look, Hugh," he exclaimed.

The envelope was of plain white paper and addressed to Mr. Wernberg.
There was no street number on it, merely the name. This in itself was not
particularly odd, nor was it the cause of Bob's surprise. On the other
side of the envelope, however, was scrawled a drawing. It was the picture
of an alligator.




CHAPTER XVII

A MESSAGE


"Well, Hugh, what do you think about that?" demanded Bob.

Hugh looked blankly at the rude drawing on the back of the envelope.
"I don't know," he said slowly. "Why should they send Mr. Wernberg one
of these?"

"Unless it's a message from one member of the gang to another."

"But Mr. Wernberg is in the hospital."

"The others may not know that."

"That's true," Hugh agreed. "This handwriting is the same as that on the
messages that came to your father and to Heinrich too."

"I know it, and the same as in the list we found in the old house."

"What do you suppose the alligator stands for?"

"I've no idea. Why did they steal Percy?"

"Anyway we'd better ring the bell and deliver our message. We can't stand
out here on the porch all day, you know."

Bob pushed the electric bell, and almost instantly the front door was
opened by Frank Wernberg. It would seem as if he had been behind the door
waiting all the time. His close-cropped light hair bristled fiercely, and
his nose was still slightly swollen; his chin also was still raw where
Bob had planted his fist the day before. Bob thought how much longer ago
than that it seemed; so many things had happened in the last two days.

"What are you doing here?" demanded Frank brusquely.

Bob and Hugh had been so surprised by the sudden opening of the door that
for a moment neither one of them replied.

"What do you want?" exclaimed Frank.

"We've got a letter for your mother," said Bob.

Frank glared at them under lowering brows. "Who from?" he asked.

"That's for her to find out," said Bob. "It's addressed to her you see."

Frank snatched the letter from Bob's outstretched hand, and made as if he
was about to go in and shut the door.

"Wait a minute," exclaimed Hugh. "Here's another."

"What kind of a joke are you trying to play on me?" cried Frank angrily.

"None at all," said Hugh. "This one is for your father."

Frank grew red in the face, "If this is a joke I swear you'll be sorry
for it," he exclaimed hotly.

"It's no joke at all," said Hugh. "We found this letter lying here under
the mat. I was just going to hand it to you."

Frank took the letter from Hugh and looked at it suspiciously. Then he
turned it over and looked at the back of it. Suddenly he turned pale.

Bob and Hugh, watching him closely, noticed this fact, and Bob, suddenly
plucking up courage, determined to speak of it.

"What does that alligator mean, Frank?" he asked.

The color rushed back into Frank's face. He looked as though he were
going to run. He swallowed hard two or three times, choked, and then
swallowed again. "I don't know," he blurted out finally, and stepping
inside slammed the door shut in the faces of the two boys.

Hugh looked at Bob and smiled. "Frank was certainly glad to see us,
wasn't he?" he said sarcastically.

"I should say so," Bob agreed. "Let's go home."

They went down the steps and walked slowly in the direction of the
Cook home.

"Frank's a queer fellow," said Hugh finally.

"He certainly is," Bob agreed.

"Do you think he knows what has happened to his father?"

"I doubt it. I don't believe he would have been so surly if he had
known."

"What do you think about the alligator?"

"I'm sure I don't know," said Bob. "It must mean something though, and
Frank must know what it is. Did you see how pale he got when he saw it!"

"Maybe it's the sign of some secret society like the Black Hand, or the
Ku Klux Klan, or something like that."

"Still I can't understand why they should send a warning to Mr. Wernberg
if he is a member of the gang."

"It may not have been a warning," said Hugh. "Perhaps it was just a
message of some kind or another."

"Then why should Frank have been so scared when he saw it?"

"Don't ask me. I'm getting more mixed up every minute."

They turned into the Cooks' yard and slowly approached the house. A man
and woman were just disappearing around the corner.

"Who are they?" Hugh inquired.

"Lena, the cook, and one of her beaux," said Bob.

"I thought Heinrich was in love with her."

"He is," laughed Bob, "but he has a rival, and that's the man."

"What's his name?"

"Karl Hoffmann."

"Another German," said Hugh soberly.

"Say, Hugh," laughed Bob, "you certainly are suspicious. You suspect good
old Lena, and now you suspect the man with her because he has a German
name. Why, that man Hoffmann has worked for father for years, and father
thinks the world of him."

"That doesn't mean he may not be mistaken," Hugh insisted.

"Why, father has even selected him as one of the guards for the factory,"
said Bob. "I guess that shows how much confidence he has in him."

"But suppose Lena is disloyal," exclaimed Hugh. "If Karl Hoffmann is in
love with her there's no telling what she might get him to do."

"But Lena is not disloyal," said Bob peevishly. He was becoming tired of
Hugh's constant slurs against the people whom his father employed.

"Well, I'd watch them all," said Hugh.

Bob offered no further comment. He could not convince Hugh that his
suspicions were unfounded so he decided there could be no use in arguing
with him. They entered the house and found Mr. Cook seated in the
library alone.

"Did you deliver my note?" he asked.

"We did," replied Bob.

"Who came to the door?"

"Frank," and Bob related their experiences to his father. Mr. Cook was
much interested and puzzled by the manner in which Frank had acted when
he saw the drawing of the alligator on the back of the envelope.

"We thought perhaps it might be the sign of some secret society,"
said Hugh.

"Possibly so," agreed Mr. Cook. "Let's see; the same sign was on the
paper you found in the old house, Heinrich got a note with the
picture on it, and now this letter you picked up on the Wernbergs'
porch had it too."

"And the handwriting was the same as on that postal card you got this
morning," said Bob.

"I didn't see any picture on that though."

"No," agreed Bob. "Neither did I."

"I threw the card away," said Mr. Cook. "I was afraid your mother might
find it and worry."

"Perhaps there won't be any more trouble, now that Mr. Wernberg is out of
the way," suggested Bob. "If he was the leader of the gang, his burns
will keep him in the hospital and out of mischief for some time to come."

"You didn't hear what happened this afternoon then?" asked his father.

"No, what?" demanded Bob and Hugh in one breath.

"You remember the railroad bridge, don't you?"

"I guess we'll never forget that, will we, Hugh?" exclaimed Bob. "You
don't mean that they tried to blow it up again?"

"Well, it looks so," said Mr. Cook. "One of the guards on the bridge this
afternoon saw a man coming down the river in a rowboat. He called to him
to halt, but the man kept right on. The guard challenged him three times,
but as the man gave no answer he fired at him."

"Did he kill him?" demanded Bob excitedly.

"No," said Mr. Cook, "he didn't try to kill him. He just wanted to scare
him, and when he fired the man jumped out of the boat into the water. The
guard hurried down to the bank of the river, but the man had scrambled
ashore and run off; you know it's quite a long distance from where the
railroad tracks cross the bridge down to the water. The guard got a long
pole and waded out into the river after the boat. He caught it finally
and when he had hauled it ashore he found it was loaded with dynamite. Of
course no one knows, but they think he planned to blow up the bridge."

"Whew!" exclaimed Hugh. "The man got away, you say?"

"Yes, unfortunately."

"Couldn't the guard see what he looked like?"

"Yes, he did see that, and here is the interesting part."

"What do you mean?"

"Why," said Mr. Cook, "the man was rather slight, weighing perhaps a
hundred and fifty pounds and he had a close-cropped black mustache."

"The fake detective!" exclaimed Bob. "Was that who it was?"

"The description fits him, doesn't it?"

"Yes," agreed Hugh, "but he was out at the old house this afternoon. How
could he be on the river at the same time?"

"He was out at the old house early this afternoon," said Mr. Cook. "This
episode at the bridge happened only about an hour ago."

"He must have hurried right down there," exclaimed Bob. "When he realized
that the police were on his trail he probably decided he had no time to
lose, and that's why he dared try such a thing in broad daylight."

"Where did you hear about it, Mr. Cook?" inquired Hugh.

"Sergeant Riley just told me over the telephone; I had called him up to
inquire how Mr. Wernberg was getting along."

"How is he?" asked Bob.

"Pretty bad yet; once in a while he recovers consciousness, but only
for a few minutes. Besides he suffers so from his burns he can't do
any talking."

"And meanwhile his gang keeps on working," said Hugh.

"Is that fake detective part of his gang?" said Bob. "He's the one who
blew him up."

"I don't know," exclaimed Hugh in despair. "We just go 'round and 'round
in circles and don't seem to get anywhere at all."

"But the fact remains, doesn't it, boys," inquired Mr. Cook, "that
whether we know who the gang is, and what the relations are between the
two gangs--if there are two--that somebody is hard at work plotting
against this country? Also they are becoming bolder for they know that
their time is short; sooner or later they are bound to be caught."

"You're afraid for your factory to-night, aren't you, father?" asked Bob.

"I am, indeed," said Mr. Cook.

Bob was on the point of asking if he and Hugh might not help guard it
when the telephone rang and his father was called away to answer it.




CHAPTER XVIII

KARL HOFFMANN


"Let's go down and talk to Heinrich," exclaimed Bob when his father
left the room.

"Aren't you going to ask your father if we can stand guard to-night?"

"Wait till after dinner. I'll ask him then."

"Do you think he'll let us?"

"I guess so. It depends on how badly he needs us."

They went out, and just at the corner of the porch met Karl Hoffmann. He
had said good-by to Lena and was on his way home. Bob knew him well, as
he did most of his father's employees, for much of his spare time was
spent down at the factory. Furthermore, on account of Lena, Hoffmann was
a frequent visitor in the Cook home.

He was a big, fine looking fellow of about forty. He had black hair and a
piercing black eye, a typical Prussian, for it was from that province in
Germany that his parents had migrated some twenty-five years previously.
He was a powerful man, standing nearly six feet in height, and not yet
showing any tendency towards stoutness, so common among Germans.

"Hello, Karl," cried Bob cheerily.

Hoffmann stopped short. His face had been drawn into a scowl as he strode
along, and he had been deeply engrossed in his own thoughts. Bob had
often seen him that way after talking with Lena, however. She was
something of a flirt and received lightly her admirers' advances. Many a
time both Heinrich and Karl had been driven almost to desperation by the
manner in which she treated them. Neither did they like each other,
because they were rivals.

"Hello there, Bob," he exclaimed, his face brightening. Bob had always
been a marked favorite of his, and many a thing he had showed him about
the machinery at the factory.

"You look mad," said Bob.

"I was sort of mad," said Karl. "I was worried."

"Anything I can do for you?" Bob inquired, nudging Hugh with his elbow.
He loved to tease both Karl and Heinrich about their love affair.

"No, thanks," replied Karl seriously. "It will be all right I hope."

"I hear you're making ammunition down at the factory," said Bob.

"Yes."

"Keeps you pretty busy, doesn't it?"

"It certainly does. We're going to work both a night and day shift
next week."

"You want to watch out for some of these bomb plotters," said Bob. "There
are a lot of them around here, I understand."

"That so?" exclaimed Karl. "I hadn't heard of any."

"Well, they're here all right."

"We have the plant guarded, you know."

"I know it. It's a good thing too."

"I think it's unnecessary," said Karl. "I told your father so, too."

"You're more of an optimist than he is, I guess," laughed Bob. "He's
heard a lot of things that have made him sort of nervous."

"That so?" demanded Karl. "I wonder what they were?"

"I don't know," Bob lied. He thought that if his father wanted to tell
his employees any details he would probably do so himself.

Just then Hugh plucked his sleeve. "Look, Bob," he exclaimed. "Here comes
Frank in to see you."

Bob swung around just in time to see Frank Wernberg on a bicycle turning
into the driveway. He rode a few yards and then suddenly turned around
and rode out again. Coming to the street once more he dismounted from his
bicycle, and gazed back at the Cooks' house as if he was debating
whether he should go in or not. Finally, however, he seemed to decide
against that course and jumping on his wheel rode off down the street.

"He lost his nerve," exclaimed Hugh. "You ought to have called to him."

"A fine chance of that," snorted Bob. "If he wants to he can come in here
and see me, but I won't run after him."

"Who was that boy?" asked Karl curiously.

"Frank Wernberg," said Bob.

"Wernberg?" exclaimed Karl. "Does his father live down on the
corner here?"

"Yes."

"I don't like that man," said Karl soberly. "I hope he's not a friend
of yours."

"He is not," exclaimed Bob warmly. "What do you know about him, Karl?"

"Nothing much; I just don't trust him."

"No one seems to like him," laughed Bob. "I guess he won't bother us for
some time to come though now."

"Why not?" demanded Karl quickly.

"He's sick."

"What's the matter with him?"

"I don't know," said Bob evasively. He suddenly remembered that probably
he had no right to talk about what they had done that day. "All I know is
that he's in the hospital."

"Serves him right," exclaimed Karl. "That's a good place for him and for
all of his same kind."

If Hugh had had any lingering doubts as to whether or not Karl was loyal
they were now dissipated. If Mr. Wernberg was implicated in German plots
against the United States, certainly no man who sympathized with him
would hate him as Karl Hoffmann plainly did.

"We may come down and help you guard the factory to-night, Karl," said
Bob. "You'll be there, won't you?"

"Yes, I'll be there," said Karl. "I wish you wouldn't come though."

"Why not!"

"Suppose something should happen and you got hurt?"

"I thought you said there was no danger."

"I don't think there is, but I know your father doesn't agree with me,
and if something should happen to you, just think how badly he'd feel."

"We want to help though," insisted Bob.

"Let the men who are paid for it do the guarding."

"But it's my father's plant," said Bob. "You don't think I want anything
to happen to it if I can help it, do you?"

"If he wants you to come, all right," said Karl. "Still you take my
advice and stay home."

He said good-by to the boys and went off toward his house. He had to be
at the factory early and wanted his supper before he went on duty.

"Well, Hugh?" demanded Bob after Karl had gone. "What do you think of
him?"

"Oh, he's all right," said Hugh.

"Do you think he would be disloyal?"

"No, I guess any man who hates Mr. Wernberg as much as he does can't be
pro-German. Still he was funny about not wanting us at the factory
to-night."

"I know why that was," exclaimed Bob. "He thinks we're just a couple of
kids and would only be in everybody's way."

"I guess so," Hugh agreed. "He seemed like a nice fellow all right."

"He is, but Heinie doesn't think so. Let's go ask him about Karl now, and
I'll guarantee you'll see some fun. Heinie gets mad the minute you
mention his name."

"He's jealous of him, isn't he?"

"He surely is. Lena likes Karl better than she does him, I think, and I
guess Heinie knows it. That's why he doesn't like Karl."

"Still I don't blame Lena," observed Hugh. "Karl is certainly
better looking."

They found Heinrich seated on a chair in the garage busily counting over
a large pile of bills. When the boys appeared he showed the same
embarrassment he had when Bob had surprised him at the same work before.

"The rich man again," laughed Bob, but Heinrich said nothing.

"Any trace of Percy?" Bob inquired.

"No," said Heinrich sorrowfully. "I guess he iss gone."

"We've just been talking to Karl Hoffmann," said Bob. "You don't suppose
he could have stolen him, do you?"

Immediately Heinrich's manner changed. He rose to his feet angrily, while
Bob nudged Hugh. Heinrich became pale with rage.

"That scoundrel!" he stammered. "I would not be surprised if he would
steal poor Percy. He iss mean and low enough to do anything."

"Why, Heinie," said Bob mildly. "I always thought Karl was a fine
fellow."

"He iss a low down snake!" cried Heinrich. "I would not trust that fellow
mit two cents."

"Lena likes him," said Bob.

Heinrich became madder than before at this remark. He stuttered with
rage, and advancing toward Bob shook his clenched fist in his face. "Sure
she like him," he cried. "Why not? He gives her presents all the time and
it iss for that that she like him. She knows what a low down cur he iss,
for I have told her so. Only because he has money and can give her
presents does she like him. But I will show her!"

"What are you going to do?" demanded Bob, somewhat alarmed by the
violence of Heinrich's manner.

"I buy her presents now," exclaimed Heinrich. "You see that?" he
demanded, pulling the roll of bills out of his pocket. "You see that?" he
repeated. "Well, I got some money now, and I show her who can buy nice
presents. She like me better than Hoffmann when I get more money than
he." Heinrich looked at the bills held in his fist, and then jammed them
back fiercely into his pocket.

"Where'd you get all the money?" asked Bob. "You didn't draw it out of
the savings bank, did you?"

"No," exclaimed Heinrich. "I earn it."

"Working for father?"

"No, for Mr. Wernberg."

"What!" exclaimed Bob, completely taken by surprise. He and Hugh looked
at each other in astonishment. This was a new turn of events.

"Yes," said Heinrich. "I do some work for Mr. Wernberg; he iss a
fine man too."

"What was the work?" inquired Bob. He remembered that Hugh had advised
him to watch their chauffeur. He never imagined, however, that even if
Heinrich was guilty he would be so bold as to confess brazenly that he
was employed by a man to plot against the United States. Still, he had
always suspected that poor Heinrich was not quite right in his head.

"I cannot say," said Heinrich. "The work iss secret."

"Why, Heinie," exclaimed Bob. "I never thought you would do a thing
like that."

"Why not?" demanded Heinrich. "I do my work here, don't I? Why should I
not make a little extra money if I can?"

"But Mr. Wernberg is a bad man."

"He iss not," Heinrich protested stoutly. "He iss one man who knows right
from wrong."

Bob shook his head sorrowfully. It hurt him to discover that their
chauffeur, a man he had grown up with and liked, was working hand in
glove with Mr. Wernberg. He never would have believed it possible had he
not heard it with his own ears from Heinrich himself. It was a great
shock to him and he knew how badly his father and mother would feel. Of
course he must tell his father.




CHAPTER XIX

A DISCUSSION


"Come on, Hugh, let's go," exclaimed Bob. Heinrich had turned away from
them and walked off angrily. The combination of Lena and Karl and Mr.
Wernberg, had been too much for him to stand apparently. He was mad
clear through.

"Well," said Bob, when they were outside, "I never would have
believed that."

"I told you to watch them all," Hugh reminded him.

"I know you did, and I guess you were right. Why poor old Heinie should
be such a fool is more than I can understand."

"Are you going to tell your father?"

"I suppose I must."

"Will he tell the police?"

"I don't know. I should think perhaps he'd have to, though."

"It's too bad," murmured Hugh. He knew how fond his friend was of
Heinrich.

"At any rate Karl is all right I guess," said Bob.

"I'll agree with you there," said Hugh. "How about Lena?"

"Don't ask me. I feel as if I couldn't think."

Mr. Cook met them on the front porch and was at once impressed by the
expression on the faces of the two boys.

"What's wrong?" he demanded.

"We've just had an awful shock," said Hugh.

"What is it? Tell me, Bob," his father urged.

"Heinrich is one of Mr. Wernberg's gang."

"Say that again," exclaimed Mr. Cook incredulously.

"Heinrich is working with Mr. Wernberg. You ought to see the pile of
money he has been paid already."

"Why, Bob," exclaimed Mr. Cook amazedly. "I think you must be mistaken."

"He just told us himself," said Bob. "He said Mr. Wernberg was a fine man
and one of the few who knew right from wrong."

"How did he happen to tell you all this?"

Bob related the circumstances to his father. When he had finished Mr.
Cook remained silent for several minutes.

"I am so sorry," he said finally. "I don't see why Heinrich told you."

"He was mad," said Bob, "and jealous."

"A dangerous man to hire for that kind of work I should think,"
exclaimed Mr. Cook. "If he would say as much as he did to you this
afternoon I don't see what there is to prevent him from telling all
he knows."

"You mean he might give the whole thing away?"

"Exactly."

"Still," said Bob, "Heinie can be awfully stubborn sometimes."

"I know it. We'd have to be clever to get a full confession from him
I imagine."

"I don't see what use he could be to Mr. Wernberg," said Hugh.

"It's a favorite method of these German plotters, Hugh," said Mr. Cook.
"Very often they get some simple-minded, ignorant fellow like Heinrich
and make a tool of him. Heinrich hasn't got brains enough to think of
anything himself."

"Are you going to turn him over to the police?" inquired Bob.

"I was just thinking of that," said Mr. Cook. "I certainly would hate
to do it."

"But he may do some damage."

"I know it and I think I know what I'll do. To-night I expect to be at
the factory practically all night; I'll keep Heinrich with me on one
pretext or another. He'll be right with me all the time so that he won't
be able to do any harm and besides I can watch his actions. I am still
hoping that he may prove to be loyal."

"I'm afraid he won't," said Bob.

"I'm afraid not too," agreed his father. "Still I won't let him out of
my sight and when morning comes we can decide what ought to be done
about Him."

"If it isn't too late."

"Let's hope not," exclaimed Mr. Cook earnestly.

"Hugh and I would like to help guard the factory to-night," said Bob.

"I think we have plenty of guards," said Mr. Cook. "You'd better stay
home and go to bed; you've had a busy time of it the last two days."

"I know it, but we want to help," explained Bob. "Somehow I have a
feeling that something is going to happen down there to-night."

"Suppose it does, and you get hurt. What would your mother say?"

"That's what Karl Hoffmann said," exclaimed Hugh.

"Karl is usually right too," said Mr. Cook. "He takes so much
responsibility about my personal affairs that really I don't know what
I'd do without him."

"He was afraid we'd get hurt," sniffed Bob.

"Karl likes you," said his father. "He doesn't want anything to
happen to you."

"We can take care of ourselves."

"I know that," his father assented. "Do you want to go very much?"

"We certainly do," cried Bob and Hugh in one breath.

"Well," said Mr. Cook, "I'm proud of you for wanting to help, and under
the circumstances I don't see how I can refuse."

"That's great!" cried Bob enthusiastically.

"It won't all be fun by a good deal," his father warned him.

"We know that, but we're ready to do anything that comes along."

The two boys were much excited at the prospect of the guard duty. It
seemed to them that at last they had been recognized as capable of aiding
in the defense of their country. Perhaps if they had known what awaited
them they would not have been quite so enthusiastic.




CHAPTER XX

ANOTHER SUSPECT


Hugh was going home for dinner, and was to return shortly afterward to
accompany Bob and his father to the factory. He left the house and Bob
started upstairs to prepare himself for the evening meal. On the landing
of the stairs he heard some one talking over the telephone and stopped to
listen. Of late he had become suspicious of every one and had fallen into
the habit of noticing every little thing that happened.

It was the cook's voice and he was doubly interested at once.

"Yes," he heard her say, "this is Lena."

Bob flattened himself against the wall and listened intently.

"What's that?" Lena demanded over the 'phone. "In the hospital, you say!"

There was a pause while the other person talked to her.

"I will try to be there," said Lena. "I also have a message for you, but
I don't know whether I should say it now or not; those blamed detectives
are on to us."

There ensued another pause while Bob became more and more excited. What
was this plot anyway that turned old and trusted servants against their
masters? Was no one to be relied upon? Who could be trusted?

"Yes, I will tell Heinrich," said Lena speaking again. "Good-by."

She hung up the receiver and Bob continued up the stairs, whistling and
trying to act as if he had heard nothing. He met Lena in the hall and she
eyed him narrowly.

"Hello, Lena," he exclaimed cheerfully. "Fine day, isn't it?"

"Yes, Mr. Bob," she said, and passed on toward the back stairs.

No sooner was she gone than Bob turned and sped down stairs again to the
library. He burst into the room breathlessly, causing his father, who was
reading his evening paper to glance up in surprise.

"Father," exclaimed Bob in a tense whisper, "Lena's in it too."

"What's that?" demanded his father. "Sit down, Bob."

Bob grasped a chair and sat down facing his father. "Lena's in it too,"
he repeated.

"In what?"

"In the plot with Mr. Wernberg."

Mr. Cook laid down his paper. "Tell me what you know," he said soberly.

Bob repeated the part of Lena's telephone conversation that he had heard.
"You see," he exclaimed, "she spoke about the hospital and that must have
meant Mr. Wernberg; then she said the detectives were on to them; finally
she said she'd tell Heinrich and also try to be there to-night."

"You don't know what she is to tell Heinrich and where she is to be
to-night?"

"No, sir," said Bob. "That's all I heard."

"Well," exclaimed Mr. Cook after a moment's pause. "This is a nice state
of affairs."

"What are you going to do about it?" asked Bob. "Are you still going to
wait until to-morrow before you report Heinie to the police?"

Mr. Cook passed his hand across his brow as if to wipe away the doubts
that assailed him. "Heinrich and Lena both," he muttered. "What a pity."

"I tell you what I'll do," he exclaimed finally. "I'll take Heinrich
along with me to-night just as I planned, and I'll tell your mother under
no conditions to let Lena go out this evening. In the morning we may know
better what to do."

"I have a better scheme than that," said Bob eagerly.

"Tell me what it is."

"Take Heinrich along with you and watch him all the time; that part is
all right. But let Lena go out if she wants to."

"What's the point of that?" demanded his father. "For all we know Lena
may he able to do more harm than Heinrich; certainly she's smarter."

"Let her go out," said Bob, "and I'll go with her."

"I don't see what you mean."

"I'll follow her."

"You'd have to be disguised."

"I know it; I'll attend to that though."

"It might lead you to some very dangerous spot," said Mr. Cook. "I hate
to have you do it."

"Look here, father," exclaimed Bob earnestly. "We're at war with Germany,
aren't we? Well, just think of all those millions of men over in Europe
on the battlefields; all the English and French, and Italians, and
Belgians, and Russians, and all the others. If the United States is in
the war we ought to be willing to do our part. Our allies in Europe are
fighting for us as much as for themselves, and it seems to me that to
disguise myself and follow the cook is a small thing for me to contribute
to the common cause."

"I guess you're right, Bob," said his father.

"Why look here," continued Bob. "Just think of the way those men over
there are every one of them risking their lives a hundred times a day. We
just can't sit still and let them do all our fighting for us. We can give
them money and food and I think we ought to expect to give our lives too
if it is necessary. I know I don't want to hide behind somebody else and
let him fight for me."

"You're all right, my boy," exclaimed Mr. Cook, rising to his feet. He
grasped his son affectionately by the arm, and there were tears in his
eyes as he did so. "You're all right," he repeated, "and I'm proud of
you. You've got the spirit that every true American should have, and
which I believe they do have. When Germany finds herself facing a million
American troops and sees the Stars and Stripes floating from the opposing
trenches she'll know she's beaten. I hope we'll show them that we mean
business and the sooner we do, the quicker the war will be over."

"What kind of a disguise can I wear?" asked Bob.

"I guess you won't need a very elaborate one. Isn't there a false-face in
the house with whiskers or a mustache on it!"

"I think there is one I used last hallowe'en."

"Get that then," said his father. "We can rip off the whiskers and glue
them on your face. Put on an old suit of clothes and a sweater; wear a
slouch hat and take along that hickory cane that I have. That ought to
fix you up all right."

"I guess it will," exclaimed Bob, much excited at the prospect. "I'll go
upstairs and look for the false-face now."

"Don't put it on until after dinner."

"I won't," said Bob as he hurried up to the attic in search of the
disguise he was to wear. In a cupboard on the top floor he found the
false-face and quickly tore the whiskers and mustache from it. He brought
the handful of hair down to his room and hid it in his closet. He
selected the oldest suit he owned and placed it on a chair with an old
slouch hat he used to wear when he went fishing.

The announcement that dinner was ready put an end to any further
preparations for the time being. The meal was a quiet one and there was
but little conversation. Mrs. Cook's thoughts were of Harold and she was
greatly worried about him; particularly as she did not know where his
regiment had been sent. Mr. Cook, although he too was concerned about his
elder son, was occupied principally with anxiety as to the plots that
seemed to be brewing all about him, and the possible damage to his
factory. Bob, needless to say, was highly excited over the prospects of
adventure that the evening held forth for him.

Finally dinner was over. Mr. Cook dispatched Bob to the garage with a
message to Heinrich to have the car ready in half an hour. As Bob ran
across the lawn he met Lena returning from the garage. "Aha," he thought
as he greeted her, "you saw Heinrich all right, didn't you?" He was fully
convinced now that their cook and chauffeur were agents of Mr. Wernberg,
and partners in crime. A moment later he reached the garage.

"Father wants you to bring the car around in half an hour," he announced
to Heinrich, who was engaged in putting on a clean collar and necktie.

"What!" exclaimed Heinrich angrily. Bob had never before seen their
chauffeur question any order that his father had given. "I can't."

"Those are his orders," said Bob, eyeing Heinrich closely.

"Does he want me to drive him out?"

"He does."

"But I can't," cried Heinrich. "I can't, I tell you; I have an
appointment."

"I guess you'll have to break it then," was Bob's retort.

Heinrich wrung his hands in desperation. "What shall I do?" he moaned.
"What shall I do?"

"Can't you change your appointment?"

"I do not think so," wailed Heinrich. "This iss terrible. Do you think
your father would change his mind if I should speak to him?"

"I'm sure he wouldn't," said Bob. "I know he wants the car and he wants
you to drive it. I heard him say that positively."

"This iss terrible," repeated Heinrich. "What will they do mitout me?"

"Who?"

"My friends."

"It's too bad," said Bob, more convinced every moment that mischief was
afoot that evening. "I don't know what you can do about it though."

"Of course I have to go mit your father," said Heinrich finally, heaving
a great sigh. "I wonder if he will want the car for long."

"I think he will."

"Very well," said Heinrich, becoming resigned to his fate, "I will be
there but only because I do not wish to lose my job. But I fear something
will happen."

"That's just what we want to prevent," thought Bob grimly. "All right
then, Heinie," he said aloud. "Father will expect you in half an hour."

He hurried back to the house, warned his father that he should keep
Heinrich always within sight, and related his conversation with the
chauffeur as an argument for this course. Then he went upstairs, two
steps at a time to make ready his disguise. While he was there Hugh
arrived and went up to Bob's room.

"What are you doing, Bob?" he demanded.

"Putting on a disguise."

"What for?"

Bob told him.

"I want to go with you," exclaimed Hugh eagerly. "Two would be better
than one anyway."

"Where are you going to get a disguise?"

"I'll borrow part of yours. You can certainly spare enough of those
whiskers to make me a mustache anyway."

"You ought to have another hat."

"You can lend me an old cap, can't you? I've got on the oldest
suit I own."

Bob brought out the glue pot and with Hugh's assistance was soon adorned
with a set of black whiskers and a mustache. His hair did not match at
all, but as he expected to wear a hat pulled far down over his eyes that
fact did not make much difference. He put on the hat, and wearing his old
clothes and a sweater looked at himself in the mirror.

"Whew," he exclaimed, "I'm certainly a hard looking character."

"You certainly are," agreed Hugh, "and you look about forty years old."

"All the better," said Bob. "Now let's get you fixed up."

With what was left of Bob's whiskers a small black mustache was twisted
into shape and glued to Hugh's upper lip. It was remarkable to see what a
great change in his appearance it made.

"When we take these things off, all the skin on our faces will come too,"
said Hugh inspecting himself in the mirror.

"Don't you care," exclaimed Bob. "What we're interested in at present is
to have them stay on to-night. How about a hat for you now?" He rummaged
around on the closet shelf and produced an old cap and a derby.

"Put the derby on, Hugh," he urged. "You'll look just like Charlie
Chaplin."

"That wouldn't do, I'm afraid," laughed Hugh. "I'd have too big a crowd
following me."

"Turn up the ends of your mustache and you'll look like the kaiser."

"Not for me!" exclaimed Hugh hastily. "I don't want to look like
anything German. I'll wear the cap, I guess. I think that's better than
the derby."

At that moment Mr. Cook appeared upon the scene. He stood and looked at
the two boys approvingly. "Well," he said, "you certainly look like a
couple of tough customers all right. I'm glad you're going along, Hugh; I
think two will be better than one."

"Is Lena still here?" asked Bob.

"Still here," said his father. "She's getting ready to leave though and
you two had better be prepared."

"Where's Heinrich?"

"He's due in about five minutes."

"You'd better watch him, father," warned Bob.

"Don't worry about that," said Mr. Cook soberly. "I suppose that you two
'things' will come to the factory later. I expect to be there all night."

"We'll try to get there," said Bob. "We'll keep track of Lena as long as
we can, and if it's possible we'll report to you at the office."

"Good," exclaimed Mr. Cook. "Don't forget to be very careful, and don't
get into trouble if you can help it."

"We'll do our best," Bob promised.




CHAPTER XXI

ON THE STREET


As Mr. Cook left the room the two boys heard the automobile come up the
driveway and stop in front of the house. Mrs. Cook and Louise were to
spend the evening with an aunt of Bob's a short distance down the street,
and Mr. Cook was to take them there in the car. Bob and Hugh waited until
they should all leave for they did not want to be seen by any one in
their disguises.

Presently they heard the car start off and they knew the coast was clear.
Silently they slipped down stairs and out the front door. By the side of
the house they paused for a consultation.

"These whiskers itch awfully," exclaimed Bob.

"So does this mustache," said Hugh. "I guess we'll have to endure
it though."

"Where shall we wait?"

"Won't Lena come out the back door?"

"I guess so. At any rate she'll have to come around and go down the front
walk, there's no other way for her to get out of the yard."

"Let's cross the street and wait there then."

They followed that plan and presently were standing side by side in the
shadow of a tree on the opposite side of the street. Lena could be
expected to appear at any minute and they kept a sharp lookout for her.

"What do you suppose is ahead of us to-night?" asked Hugh in a low tone.

"I wish I knew."

"I hope we aren't going off on a wild goose chase."

"You've been saying right along that we ought to watch Lena," Bob
reminded his friend.

"I know that and I think it's a good plan. All I say is that she may fool
us in some way if we're not careful."

"How do you suppose Mr. Wernberg's getting along in the hospital?"

"I don't know," said Hugh. "I must say though that I'm more
interested in Lena."

"I'd like to see our old friend, the false detective."

"So would I. What do you suppose he is--"

"Ssh," hissed Bob suddenly.

Around the corner of the Cooks' house came a woman. She walked briskly
and a moment later had reached the street. She gazed apprehensively up
and down while the two boys shrank farther back into the shadow; then she
started off in the direction of the city's business district.

"That's Lena," whispered Bob. "Come on."

On the opposite side of the street and perhaps a hundred paces in back of
the hurrying woman the two boys followed.

"We'll have to keep closer than this when she gets down town,"
whispered Hugh.

"I know it," agreed Bob. "She'd get suspicious now though."

Now and again Lena stopped and glanced behind her. Every time she did so
the boys stopped too; evidently she was afraid of being followed. They
met few people and those who did pass them apparently took them for a
couple of tramps, for they paid no particular attention to them.

A little distance down the street Lena turned the corner to her right.
The two boys as a consequence had to run in order not to lose sight of
her. They were fearful lest she should slip away from them and therefore
were greatly relieved when they came to the turn and saw her still in
front of them.

A few moments later she turned again, and then presently, turned still a
third time.

"She's trying to lose us," whispered Bob.

"Maybe not," said Hugh. "This is Elm Street."

"Where's twelve eighty-two!"

"On the next block."

The white stucco house was on the same side of the street with the boys,
and as Lena came opposite it she crossed over. Bob and Hugh stopped short
under a large maple tree whose trunk cast a shadow affording ample
protection from a nearby arclight. From this vantage point they watched
the woman they were trailing.

"She's going in," whispered Bob, clutching Hugh's arm excitedly.

Lena turned in from the side walk and started toward the steps of the
white stucco house, number twelve eighty-two. Half-way up she paused
irresolutely. She acted as if she was puzzled as to what she should do;
finally she turned, descended the steps rapidly and continued on down
the street.

"That was queer," whispered Bob.

"It looked as though she lost her nerve."

"Why should she be scared to go in where her gang is!"

"Don't ask me. Come on."

Once again they took up the chase. Lena seemed to walk more swiftly than
ever now, and it was not an easy task to keep pace with her and still not
be seen. The night was dark with low-hanging clouds, the street lamps
affording the only light available. Ahead they could see the reflection
from the lights of the main street of the city.

"Do you suppose she dropped a note or anything on that porch back there?"
demanded Hugh suddenly.

"I didn't see her do anything like that," said Bob.

"Nor I. At any rate I guess the best thing we can do is to stick
close to her."

"Yes, and we'd better keep closer too, now that we are coming to where
the stores are. We'll lose track of her if we don't."

"Do you suppose any one will notice that we're disguised?"

"I hope not. There's usually a big crowd on the streets Saturday
night though."

"We'll hope for luck," said Hugh earnestly.

They quickened their paces until they were scarcely more than
seventy-five feet in back of Lena. There were many people passing them in
both directions now, and apparently Lena was not as suspicious as she had
been; she glanced behind her no more.

Presently they turned into the main street. The sidewalks were thronged
with people and everything was lighted up brilliantly in the glare of
arclights and shop windows. Lena was just ahead of the boys and it was
not an easy task to follow her in the crowd.

Music sounded down the street. A troop of cavalry was approaching and
every one lined the curb to see them pass. Lena stopped and the boys
took their places directly behind her. Every trooper was mounted on a
coal black horse, and they made a fine showing as they drew near; the
crowd began to cheer and many waved small American flags that they were
carrying. Women waved their handkerchiefs as the horsemen passed, and
much to both Bob's and Hugh's surprise Lena waved her handkerchief and
clapped her hands with the others.

"What do you think of that?" whispered Bob.

"Bluff," said Hugh. "She's clever."

The crowd began to break up and presently was moving up and down the
street again. Lena started on her way once more, and almost at her heels
followed Bob and Hugh. They were beginning to wonder whether they were
following a false clue. It might be that Lena had dropped a message on
the porch of the house on Elm Street, and if so her work was probably
done and there could be no object in following her farther.

Suddenly Hugh seized Bob by the arm. "Look at this man coming," he
hissed.

Not thirty feet distant and walking directly toward them was the false
detective. There could be no mistaking him. Bob and Hugh, forgetting for
the moment that they were disguised were fearful lest he should recognize
them as well. A moment later, however, an interesting event happened
right before their eyes, and they forgot all else.

As the "detective," the man with whom they had fought that morning, the
man who had blown up the deserted house, and whom they suspected of
having tried to blow up the railroad bridge in the afternoon, passed Lena
he held a slip of paper in his left hand. As she went by she took it with
her left hand, though as far as the boys could see the two conspirators
had not even looked at each other.

Lena continued on down the street as if nothing had happened, while the
detective also kept on as though unconscious of having seen Lena at all.
He passed the two boys without even a glance.

Bob and Hugh stopped short.

"What do you think of that?" demanded Hugh. "What'll we do?"

"Follow them," said Bob quickly. "You follow him and I'll trail Lena."

Without another word the two boys separated.




CHAPTER XXII

BOB ACTS QUICKLY


Bob had almost lost sight of Lena through this temporary delay and he
hurried ahead through the crowd, bumping into several people, and drawing
black looks from many for his rudeness. He was in a hurry, however. He
had to catch up with Lena, and there was no time to be polite.

Lena too was hurrying. She threaded her way in and out among the throngs
of people, and Bob was hard put to it to keep pace with her. As he rushed
along he became more and more puzzled and confused as to what was taking
place. There was no doubt in his mind that Lena and Heinrich were working
in the interests of Mr. Wernberg and therefore were to be watched
closely. Apparently Lena was in league with the fake detective too, else
why should he stealthily slip a communication into her hand?

But the detective had blown up the house when Mr. Wernberg was within it
and had nearly caused his death. If they were all working together how
was that fact to be reconciled with what had befallen him? Probably Mr.
Wernberg had been injured accidentally as Sergeant Riley had explained.
At all events Lena was hurrying along through the crowd and Bob's task
was to follow her. His father was watching Heinrich and it would never do
for Bob to let his quarry escape him.

Lena followed the main street for several squares. The crowd was still
thick, but Bob kept his eyes on her. Presently she turned down a side
street, where it was easier to follow her and Bob heaved a sigh of
relief. He was sure he could keep track of her now, and his mind was
easier. They passed fewer people all the time, and now the only
illuminations were the street lamps and an occasional arclight.

Bob dropped further behind. His one wish was to avert suspicion on Lena's
part, and the sight of a tough-looking man with heavy black whiskers, old
clothes, and a dilapidated slouch hat dogging her footsteps might well
have made her uneasy.

Every hundred feet or so Lena cast a quick glance over her shoulder. Bob
did not walk on the stone pavement, but skulked along in the shadow of
the hedges and fences except when a passerby came along. Consequently
whenever Lena looked behind her he stood still. It was exciting work.

A half-mile or so down the street Lena stopped. She stood under one of
the street lamps, and after a sharp glance in all directions, stealthily
drew a piece of paper out of the bag she carried. She was plainly
nervous, and Bob watched her intently. She was about to read the note
that the fake detective had handed to her.

It took Bob only a second to make up his mind. The occasion called for
quick action and he acted quickly. Running swiftly and silently on the
moist earth, he stole up behind Lena. She was standing still, deeply
engrossed in what she read on the paper she held in her hand.
Consequently she was unaware of Bob bearing down upon her.

When he was about ten feet behind her, Bob suddenly dashed forward, even
more swiftly than before, and before the startled cook knew what was
happening he had snatched the paper from her hand and was speeding away
with it. He ran only for a few steps, however. An exposed root from one
of the big maple trees that lined the sidewalk caught his foot; he
tripped, was thrown violently forward, and fell sprawling on his face. He
did not relax his hold on the paper, however. It was crumpled, but he
held it tightly clenched in his hand.

The fall jarred him considerably. The knee of his trousers was torn and
his hand scraped. His hat fell off, and as he slid along the ground on
his face, half of his false whiskers were ripped off. He picked himself
up as quickly as he could, however, and turned around to see what Lena
was doing.

She was nowhere to be seen.




CHAPTER XXIII

UNDER THE LIGHT


Hugh turned quickly and followed the fake detective through the crowd.
The man sauntered along as if he was in no hurry whatsoever, so that Hugh
too had to walk very slowly. The man stopped and looked in at the windows
of many of the stores, and close behind him every time stood Hugh; he was
at a loss to account for this behavior on the part of the man he was
following, as his dilatory tactics were in sharp contrast to the way in
which Lena had hurried.

Every few moments the fake detective took out his watch and looked at the
time. Hugh decided he must have an engagement for later on in the
evening, and that until then there was nothing for him to do.

As nine o'clock struck on the City Hall clock the man whom Hugh had been
following stepped into a drug store. There was a row of telephone booths
along one side of the store and the man entered one of these and shut the
door. Hugh could see him through the glass, as he took down the receiver
and gave the number to central.

Hugh loitered around the store, looking at the various articles offered
for sale under the numerous glass cases, while at the same time he kept
a careful watch on the telephone booth. The man talked for what seemed
a long time and finally Hugh was afraid to remain in the store any
longer lest he should arouse suspicion. He went out and took his stand
near the front entrance, in a spot where he could see every one who
came in or went out.

There were large posters in the store window urging men to enlist in the
army and the navy. Pictures of trim looking soldiers and sailors were on
the posters and the cards bore urgent calls for recruits. "Your country
needs you _now_," ran the legend and Hugh sighed to think that he was not
yet old enough to answer the call. His ancestors had been Americans for
many generations, they had fought and bled in every war the country had
declared, and Hugh wanted to live up to the traditions they had
established. He realized too that his country did need men, perhaps as
never before. He knew that in order to defeat Germany every ounce of
strength the country possessed would have to be thrown into the struggle.
As his father said, "Germany is beaten, but they don't know it yet, and
it may take years of stubborn fighting to teach them."

Hugh's thoughts were interrupted presently by the reappearance of the
fake detective; he came out of the drug store and turning to the right
walked off down the street. He hurried now, so that Hugh had trouble in
keeping pace with him. The man walked swiftly as if he had some definite
objective in view, and Hugh realized that probably the crisis of the
whole affair was not far distant.

Suddenly Hugh spied a rough-looking individual approaching them from the
opposite direction; his clothes were dirty and the knee of one of his
trousers legs torn. He recognized Bob at once.

The fake detective eyed Bob as he passed, but probably took him for some
tramp passing through town; certainly he looked the part. Every one in
the crowd edged away from him as he drew near, and Hugh could not help
wondering if he looked as tough as his friend.

Bob recognized Hugh as he came along without a word of greeting, turned
about and walked along beside him. He had seen the fake detective on
ahead and though there was no chance for explanations, he knew that Hugh
was still on the trail.

In a few moments they came to the City Hall. The detective looked up at
the clock on the tower, compared the time with his watch and then took
his stand under one of the electric lights on the street in front.

"He has a date here," whispered Hugh. "We'll have to cross the street."

They crossed over and under the pretense of looking at the billboards in
front of the moving picture theater kept watch on their man.

"Where've you been?" demanded Bob.

"Just following that man around," said Hugh. "What happened to you?" and
he looked at his friend's torn and dirty clothes.

Bob related the story of his experiences. He had searched vainly for any
trace of Lena and failing to find her had resolved to take one turn along
the main street and then go down to the factory. He had met Hugh as has
been told.

"But the paper Lena had," exclaimed Hugh. "You got it you say?"

"I certainly did."

"What did it say?"

"Read it," said Bob, handing the crumpled sheet over to his companion.

Hugh started to unfold it, but before he could do so, Bob grasped him by
the arm and pointed across the street. "Look," he exclaimed.

A woman had joined the fake detective under the light, and the two were
talking together.

"It's Lena!" said Hugh excitedly.

"But where did she come from?"

"I don't know, but there she is all right."

"He's mad about something," said Bob. "Probably because she lost that
piece of paper."

"That'll prove to him they're being watched."

"I wonder if they suspect us."

"Let's hope not, yet," said Hugh earnestly. "There they go," he added a
moment later, as Lena and the fake detective started down the street.
They still were talking excitedly together and it was hard to tell from
their manner whether the man was threatening Lena or pleading with her.

"Another chase, I suppose," sighed Bob. "I'm getting tired."

"Not a chase on foot anyway," said Hugh, for just then the fake detective
hailed a passing cab; he and Lena stepped into it and a moment later were
being driven rapidly away.




CHAPTER XXIV

AT THE FACTORY


"Well," exclaimed Bob in dismay, "I guess they got rid of us that time."

"Why have they?" demanded Hugh. "Why can't we hire a cab and
follow them?"

"Have you got any money?"

"Not a cent."

"Neither have I. I guess we're left."

"Aren't we fools?" cried Hugh angrily. "How could any one be so stupid?"

"There's no use in crying over spilt milk," said Bob. "The thing for us
to do is to decide what we ought to do next."

"Let's go down to the factory; I don't see what else we can do."

"All right," said Bob disconsolately. "I do hate to have to go and tell
father that we've been tricked and beaten though."

"He can at least get the police to come down and help guard his factory,"
said Hugh. "Probably no harm will come to it if they do that."

"But how do you know his factory is to be attacked? It may be they are
planning other damage to-night. We might have had a chance to stop it if
we'd followed those two, and now they've got away from us."

"Your father ought to have reported Lena and Heinrich to the
police anyway."

"He said he'd keep watch of Heinie, and no doubt he has. He expected we'd
do as well for Lena. We'd better go down and see him about it."

"Let me read this paper first," said Hugh. He once again started to
unfold the crumpled sheet that Bob had stolen from Lena.

"You can't read it."

"Why not?"

"Try and see."

Hugh unfolded the paper and gave it one look. "Why it's written in
German," he exclaimed in surprise.

"I know it is; that's why I said you couldn't read it."

"We must get it translated."

"Let's take it down to the factory. We can get Karl Hoffmann to tell us
what it says."

Without further ado they set out. They walked swiftly and exchanged but
few words, for they were both occupied with their own thoughts; a feeling
that something was hanging over their heads oppressed the two boys. The
country was at war and plotters and spies were abroad in the land. The
events of the last two days had convinced them that High Ridge had its
share of mischief makers, and they felt sure that that very night a blow
would be struck.

A walk of twenty minutes brought them to the factory. The low, brick
buildings loomed ghostly in the darkness, with only here and there an
electric light burning inside as protection against thieves. The small
brick office was situated in front of the other buildings and here a
light was shining brightly.

A guard challenged them. Bob recognized the man as one of his father's
employees, and soon convinced him that he and Hugh were all right. They
passed on and a moment later were in Mr. Cook's office. Mr. Cook was
seated at his desk and in a chair opposite him Sergeant Riley was
ensconced.

"Well," exclaimed the sergeant as the boys entered, "if ever I saw two
hard looking bums you two are it. 'Tis a wonder one of my men didn't
run yez in."

"We were sort of afraid of that," laughed Bob. "No one bothered us
though."

"Where's Heinrich?" inquired Hugh.

"In the next room," said Mr. Cook. "Where's Lena?"

"We lost her."

"What do you mean?"

Bob told his father what they had done.

"It looks serious," said Mr. Cook thoughtfully. "Sergeant Riley has just
come from the hospital and he brought me news of Mr. Wernberg."

"How is he?"

"He's better; he talked a little this evening."

"Did he?" cried Bob eagerly. "What did he say?"

"He didn't talk connectedly," said Mr. Cook. "He was only conscious for a
few minutes, and wasn't well enough to hold a real conversation."

"But he must have said something."

"He did. He mumbled about bombs, and plans. He talked a lot about a
factory, and kept saying, 'hurry,' over and over again."

"Didn't any one ask him what he meant?"

"I asked him myself," exclaimed Sergeant Riley, "but he was not well
enough to answer me or understand what I was saying."

"Do you think he referred to this factory?" inquired Hugh.

"The sergeant thinks so," said Mr. Cook. "There are only two others in
High Ridge that they would try to destroy probably, so you see the chance
is one in three that he was speaking of this one."

"I can't imagine a man plotting such things," said Bob bitterly. "He
thinks he's helping Germany I suppose."

"Huh," snorted Bob. "A nice kind of man that will earn his living in a
country and then try to blow it up. Is he going to get well?"

"The doctors say he has an even chance," said Sergeant Riley.

"Well, all I hope is," said Bob, "that when he does get well they take
him and put him in jail for about fifteen years. Have you got plenty of
guards, father?"

"I think so," said Mr. Cook. "I've got all I can get anyway."

"Hugh and I are ready to help you know."

"I know it, and I may use you later to-night; we will need them more
then probably. In the meantime why don't you go and lie down for a
little while?"

"We've got a paper here to be translated first," said Bob.

"Give it to me," exclaimed Mr. Cook. "I'll call Heinrich in."

In response to his summons Heinrich soon appeared from the next room. He
looked pale and haggard as though he was tired and worn and worried. He
glanced from one to another of the people gathered around the desk, but
even his old pals, Bob and Hugh, gave him no more than a fleeting smile.

"We have a letter or something here written in German, Heinrich," said
Mr. Cook. "I'd like to have you translate it for us, please."

Heinrich took the paper that was held out to him. Every one watched him
narrowly as he looked at it, and were amazed to see him suddenly turn
deadly white. His hand shook violently and he had to lean against the
desk to keep from falling. He gazed at Mr. Cook pleadingly, a hunted look
in his eyes.

"What does it say?" asked his employer.

Heinrich gasped and almost choked once or twice. He swallowed hard and
finally found his voice again. "I don't know," he replied.

"You mean you can't read the German?"

That seemed to be as good an excuse as any, so Heinrich seized upon it
eagerly. "Yes," he stammered. "That iss it."

"I don't believe you," said Mr. Cook calmly.

"Please, Mr. Cook," begged Heinrich. "Don't ask me to read it."

"But I want to know what it says."

"I can't read it."

"You don't mean that," said Mr. Cook. "You certainly can read it."

"I can't read it," Heinrich repeated. It was plain to be seen that he was
suffering great mental agony; he glanced about him fearfully as if he
expected to be attacked suddenly. He looked at the paper again and an
involuntary groan escaped him. He appealed to Mr. Cook.

"Please let me go home," he pleaded.

"You won't even leave this room until you've read what that says,"
exclaimed Mr. Cook, becoming angry and irritated at Heinrich's refusal to
do as he said. Bob had seen their chauffeur stubborn before, however, and
he knew that if he made up his mind to a thing he was as obstinate as
only a German can be.

Heinrich merely looked at Mr. Cook sorrowfully.

"I'm a policeman you know," said Sergeant Riley sharply.

Heinrich ignored the implied threat completely.

"Come on, Heinie," urged Bob cajolingly. "Don't be foolish."

"I can't read it," said Heinrich again.

"You know," said Mr. Cook, "we're suspicious of some things you have done
already, Heinrich. Don't make it worse if you can help it."

"I can't read it," said Heinrich.

Bob knew the chauffeur well enough to know that there was no use in
arguing with him further; it would only be a waste of breath and time.

"I don't want to turn you over to the police, Heinrich," said Mr. Cook.
"That is what I shall do, however, unless you do as I ask."

Heinrich turned paler than ever at this, but the words had no
other effect on him. "I can't help it," he muttered doggedly. "I
can't read it."

"Let me see the paper," said Sergeant Riley. Heinrich handed it over.

"What's the little alligator doing on it?" queried the sergeant
curiously.

"Heinrich can tell you," said Mr. Cook. "What does it mean, Heinrich?"

The chauffeur made no reply. He looked at the floor dejectedly but
offered no remark. Now and again he glanced about him nervously.

Just at that moment the door of the office was opened and Karl Hoffmann
entered. Heinrich looked at the newcomer, and there was hatred in his
very glance. His fists were clenched tightly so that his knuckles showed
white. He opened his mouth as if about to speak, and apparently with
difficulty checked himself.

Karl Hoffmann took in the scene with one glance and was plainly surprised
by the gathering. At first he did not recognize Bob and Hugh, who still
wore their disguises. Both boys greeted him, however, and laughed at his
surprise when he discovered who they were.

Karl himself looked pale as though he was working under a high tension;
certainly the times were strenuous. He held something in his hand that
apparently he wished to give to Mr. Cook. Before he could speak, however,
Mr. Cook anticipated him.

"Here is a paper, Karl," he said. "It has German written on it and I'd
like to have you translate it for us if you will."

As Karl took the paper Heinrich started forward as if he would protest.
He was pale and his lips were shut tight; his face was the picture of
desperation. He looked as if he had reached the limit of his endurance
and must speak. For a moment Bob thought he was going to spring at Karl.
Heinrich finally got control of himself, however, and relapsed into a
sullen calm.

Karl took the paper and looked at it carelessly. Suddenly his jaw
dropped and he started back aghast. He turned almost as pale as
Heinrich had done.

"Where did you get this?" he demanded.

"Tell us what it says," urged Mr. Cook.

"This is certainly remarkable," said Karl, though by this time he had
partly regained control of himself.

"He won't read it, I bet," said Heinrich fiercely.

"Keep quiet, Heinrich!" exclaimed Mr. Cook sharply. "Karl is a good
American; of course he'll read. Won't you, Karl?"

"Certainly I will," said Karl easily. He had entirely recovered his
composure now.

He had just opened his mouth to speak when he was interrupted by a
volley of shots outside. Instantly everything was in confusion. Every
one made a rush for the door and as it was yanked open a piercing shriek
rent the air.




CHAPTER XXV

A STRUGGLE IN THE DARK


The woman's scream was so full of terror, so agonized, and so
blood-curdling that for a moment the mad rush out of the door was halted.
Every one stopped short in horror and amazement.

Sergeant Riley was the first to regain his senses. "Come on!" he shouted
and plunged out into the night. Close at his heels followed the others.
That is, all except Heinrich; he dashed into the room adjoining the
office and remained there unnoticed.

The air was filled with shouts and cries. Men ran hither and thither,
black shapes flitting up and down like shadows.

"Spread out!" shouted Sergeant Riley. "Circle the factory and don't let
any one escape."

Bob and Hugh unconsciously kept close together in spite of the sergeant's
orders. One end of the factory was situated on the shore of the Molton
River, and toward the river bank the two boys made their way.

"What a scream that was," shuddered Hugh.

"Awful," cried Bob, and then he tripped over something lying on the
ground, and pitched forward headlong on his face. A moment later he had
regained his feet.

"What tripped you?" demanded Hugh.

"Look!" said Bob, shivering as he spoke. He pointed to a misshapen heap
of something lying on the ground at his feet. "It was soft, like a body."

"The woman who screamed," cried Hugh in terror.

"Strike a match."

"I haven't got one."

"We must pick her up and carry her into the office."

"But she may be dead."

"Suppose she is," exclaimed Bob. "We've got to do it just the same."

"This is terrible," cried Hugh. "Can't we get some one to do it for us?"

"Every one is busy."

"Where's Karl?"

"He's busy, too. Come on, Hugh, we must do it. If she's not dead now she
may die while we stand here and talk about it."

Hugh braced himself for the task. They could distinguish the vague
outlines of the woman's form, as Bob stationed himself at her head and
Hugh grasped her feet.

"All ready," said Bob. "Lift her up."

"Suppose we are attacked while we're carrying her."

"Lift her up, will you?" demanded Bob angrily. "What's the matter with
you, Hugh?"

Bob took hold of her shoulders and Hugh grasped her ankles. She was
heavy and absolutely limp so that it was very difficult to lift her from
the ground. The two boys exerted all their strength, however, and
presently were able to start on their way back to Mr. Cook's office,
panting and straining as they went. The distance was not great,
fortunately, and soon they opened the door of the office and deposited
their burden on the floor.

"Why," gasped Bob, starting back in surprise. "It's Lena."

"What?" demanded Hugh.

"It certainly is. Look at the blood on her shoulder."

"Is she dead?"

"I don't know." He took hold of Lena's wrist and felt for her pulse. "Her
heart is still beating," he announced a moment later.

"Hadn't we better get a doctor?"

"I should say so," exclaimed Bob. "Call up Doctor Clarke and tell him to
come down here just as fast as he can."

Hugh hastened to obey, while Bob secured a towel soaked in water and
began to bathe the wounded woman's face. How had it all happened? Perhaps
one of the factory guards had surprised her at some criminal work and had
shot her as she fled. Bob did not know enough to understand whether she
was badly wounded or not; at any rate she was still bleeding profusely.

Presently Hugh reported that the doctor would be down just as quickly as
he could. He had promised to start at once.

"What shall we do?" inquired Hugh.

"Don't you think we ought to stay here with Lena?"

"I don't see that we can do anything for her, and we may be needed
outside. Where's Heinie? Why don't we leave her with him?"

"Where _is_ Heinie anyway?" exclaimed Bob. He hurried to the door of the
adjoining room, but there was no trace of the missing chauffeur.

"He's gone, I guess," said Hugh. "When every one rushed out in the
excitement he must have slipped away. We'll never see him again."

"How stupid of us," cried Bob. "Every one clean forgot him, I guess."

"His escape doesn't settle what we have to do," said Hugh.

"Let's go out and leave her here, I say. We don't know anything to do for
her. Anyway you told the doctor where to come, didn't you?"

"I did."

"Come on then," and Bob hurried out, with Hugh following close behind.

In front of the office they stopped for a moment, peering intently all
about them and straining their ears for every sound. Bob remembered the
big hickory stick of his father's and stepped inside again to get it.

"We're taking chances prowling around here unarmed," said Hugh when his
friend had joined him once more.

"I know it, but what can we do?"

"Nothing, I guess. Where do you suppose the others are?"

"Let's go find them."

Again they started in the direction of the river, not in a mad rush this
time, but slowly and carefully picking their way. They skulked along in
the shadow of the factory walls, ready for any emergency that might
arise. They kept close together and if the truth were known both boys
would have been very glad to have had an armed companion with them.

They had covered perhaps a hundred and fifty feet or so, and ahead of
them could just make out the dark bank of the river. Suddenly they saw a
man appear around the corner of the building, running toward them. Bob
and Hugh crouched against the brick wall and waited for him to come
near. All at once Bob recognized the stranger and started forward.

"Karl," he cried.

The man halted.

"Where are you going?" asked Bob. "Where are father and the others?"

"Down by the river," replied Karl and once more broke into a run. A
moment later he was lost to sight in the darkness.

"Seems to me he's in an awful hurry," remarked Hugh.

"Father had probably sent him on an errand," said Bob. "Let's hurry and
see if we can't find father and Sergeant Riley."

"Who do you think shot Lena?" asked Hugh.

"I don't know. We'd better not talk here now."

"Do you suppose it could have been the fake detective?" said Hugh
regardless of Bob's advice.

"I don't know, but I don't see why he should shoot one of his own gang."

"He blew up Mr. Wernberg though."

"I know it, but I can't understand it, and as I said I don't think we
ought to talk here."

They proceeded in silence. Both boys were eager to join the others and
they wondered what they could be doing down by the river. Perhaps they
had captured the plotter and had dispatched Karl for rope or handcuffs
to secure him. At any rate nothing suspicious had happened since the
shots had first been heard.

The boys had progressed but a short distance further, when suddenly a
great tongue of flame shot heavenward between them and the river. An
ear-splitting detonation followed, and the very earth was rocked by an
enormous explosion. Both boys were thrown violently to the ground by the
force of it, while showers of earth, bricks, and material of all kinds
pelted down all about them.

A moment later the boys were on their feet, still partly stunned and
undecided as to whether they should run or not.

"There may be another one coming," warned Hugh.

While they hesitated a man suddenly appeared running swiftly away from
the direction of the explosion.

"Hey there!" challenged Bob. "Who are you?"

For answer there came the flash of a revolver and a pane of glass in the
window close beside the boys' heads was shattered.

"Stop!" shouted Bob at the top of his voice and regardless of danger he
started in pursuit of the fleeing man. Hugh was not to be left behind at
such a time and together they raced after the fugitive.

Suddenly he stopped, raised his right arm, and hurled his revolver. It
struck the ground directly in front of Hugh, spun around a number of
times and hit him a sharp blow on his shin bone as it caromed.

"Let it alone," cried Bob.

"It must be empty."

Both boys were fleet of foot, but in the first fifty yards of the race
the man gained on them. It was plain to see that unless something
happened they would soon be outdistanced. Bob realized that the time had
come when chances were to be taken. He raised his father's hickory cane
above his head, whirled it around a couple of times, and sent it spinning
in the direction of the fleeing figure ahead.

The one chance in a hundred was successful. Bob's aim was true and the
heavy stick flew straight to its mark. As the man ran, one end of it
protruded itself between his legs; he was tripped up and, losing his
balance, fell sprawling to the ground. Almost instantly he was on his
feet again, but the delay occasioned by his fall had been almost
sufficient to enable the boys to catch up with him. They were barely two
steps behind him now.

"Tackle him!" shouted Bob.

Like two ends going down the field to get the quarterback who is
receiving the punt Bob and Hugh leaped forward at the same time. They
had both had experience in football and it stood them in good stead now.
The man went down, both boys literally swarming all over him.

"I've got his legs, Hugh," cried Bob. "Grab his arms."

The man kicked and struggled with all the strength that was in him. Bob
hung on for dear life, however. He held one of the man's feet in each
hand and threw his body across his legs to hold them down. Hugh scrambled
forward and hurled his entire weight across the man's chest. Their
prisoner's fists were going like flails, but Hugh persisted. The thought
of this German plotting against the United States was more than he could
endure and he dealt the man a stunning blow squarely in the face.

A moment later the man's arms and legs were tightly pinned to the ground
while the two boys sat astride him, complete masters of the situation.

"I'd like to pound his head off," cried Bob fiercely. "Just look at
that fire."

The bomb had done its work, and already the flames were mounting higher
and higher over the damaged portion of the factory. The fire whistles
were blowing violently; some one had turned in the alarm promptly anyway.

"What shall we do with him?" panted Hugh.

"You didn't knock him out when you hit him, did you?"

"No. He's all right."

"Let's get him on his feet and take him up to the office then."

"Hang on tight."

"Don't worry about that. If he tries to get away we'll choke his
head off."

Whether or not the man understood these remarks he offered no comment.
Hugh held him by one arm and Bob by the other. They yanked him to his
feet and marched him off in the direction of the factory office. Strange
to say their prisoner offered but little resistance; he dragged his feet
somewhat but followed along sullenly.

Presently there was a clatter and a clang of bells and the fire engine
dashed into the yard, shooting sparks in a broad yellow stream from its
stack. There was much shouting and giving of orders, and a moment later
the hose cart, and the hook and ladder made their appearance.

Whether or not it was the distraction caused by these events, Bob and
Hugh never could explain to themselves. At any rate they must have
relaxed their caution and paid less attention to their prisoner than they
should, for with a sudden violent twist of his body he wrenched himself
free and was gone.




CHAPTER XXVI

AN EXPEDITION IS PLANNED


"Catch him! Catch him!" shrieked Bob hysterically.

The man darted away in the direction of the fire engine with the two boys
pursuing him at top speed. The fugitive was fleet of foot, however, as
had already been proved to Bob and Hugh. He was gaining rapidly on his
pursuers, while their shouts and calls were lost in the general hubbub
and confusion incident to the fire.

A short distance along the course of the chase two barrels supporting a
plank were standing. As the man passed them he hesitated long enough to
dislodge the plank and upset the barrels. They rolled directly in the
path of the two boys, one of them causing Hugh to trip and fall. Bob
kept up the chase, however, but the factory yard was now filled with
people attracted by the fire and the man he followed soon eluded him in
the crowd.

There was nothing for Bob to do, but give up. He turned back and
presently discovered Hugh limping toward him.

"Hurt yourself?" he demanded.

"I skinned my knee. Where's our man?"

"He got away in the crowd."

"We're a couple of fine ones," exclaimed Hugh disgustedly.

"We certainly are," echoed Bob. "I'm getting so I'm ashamed to see
father; all I do is report failures to him."

"We'd better go back to the office and see him though."

They returned to the office and at the door met Mr. Cook coming out. He
greeted the boys heartily, for he had been worried about them.

"I'm glad to see you two," he exclaimed. "I was afraid something had
happened to you."

"Oh, we're all right," said Bob. "Where's Lena?"

"What do you mean?" demanded his father. "I haven't seen her."

"Well, just look at that," said Bob, pointing to a dark stain on the
floor. "That's where she was lying; she was the woman who screamed."

"You don't tell me!" exclaimed Mr. Cook. "Was she badly hurt, and who
shot her?"

"We can't answer either question. All we know is that we found her
outside, unconscious, and brought her in here. She was wounded in the
shoulder and bleeding badly. We left her here and went out again."

"Why didn't you telephone for a doctor?"

"We did. We sent for Doctor Clarke."

"And here's a note from him on the table here," exclaimed Hugh. As he
spoke he handed the piece of paper to Mr. Cook.

"'Have taken patient to hospital in order to remove bullet,'" Mr. Cook
read aloud.

"Golly," exclaimed Hugh. "There's lots going on around here, isn't
there?"

"Too much," said Mr. Cook soberly. "I hope that explosion hurt no one."

"How about the fire?" asked Bob.

Sergeant Riley arrived just then and reported that the fire department
had the blaze under control and that it was only a question of a short
time before it would be entirely out.

"'Tis lucky it is no worse," he said seriously.

"And it's also lucky that my insurance will pay for it all," added Mr.
Cook.

"The thing that makes me mad is that the German divils who exploded the
bomb all got away," exclaimed the sergeant bitterly.

"Were there more than one of them?" asked Bob.

"We don't know for sure," replied Riley. "One o' the men told me he saw
two of them running away, but he may have been mistaken."

"Well, Hugh and I caught one of them," said Bob.

"You did!" almost shrieked Sergeant Riley, bouncing out of his chair.
"Where is he then?"

"We don't know."

"What do yez mean?"

"He got away from us, and we lost him in the crowd."

"Oh, my boy, my boy," wailed Riley, nearly in tears. "Why did yez ever
let such a thing happen to you? That was our chance to put a crimp in the
whole gang, and now I suppose they'll be after blowing things up worse
than ever."

"But we didn't do it on purpose," protested Bob meekly.

"I know yez didn't," said the sergeant. "If I had only been there! I can
tell yez that if ever I get my hands on one of them fellers he'll never
get away."

"It's too bad," exclaimed Mr. Cook. "Still I don't think the damage they
did here will seriously interfere with our work for the Government."

"I hope not," said Sergeant Riley fervently. "I hope yez can make enough
ammunition to blow the bloody Germans clean out of France and Belgium and
sink every blooming submarine they have on the ocean."

"I hope so, too, Riley," said Mr. Cook. "There's no room in a decent
world for people who act as the Germans do."

"First of all though we've got to fix it so they can't interfere with
our factories over here," exclaimed the sergeant. "I wish we could catch
this gang."

"What happened to Heinrich?" asked Bob. "Did he get away?"

"He did not," said Sergeant Riley. "One of my men escorted him to the
police station where he'll be waiting until we want him."

"He didn't say what was on that sheet of paper, did he?"

"Not yet."

"Where's Karl?" asked Bob. "He was going to read it for us."

"I don't know where Karl is," said Mr. Cook. "He hurried off to look
after part of the factory just before the explosion occurred. He's a good
soul, Karl. I wish all the German-Americans were as loyal as he is."

"Did one of the guards shoot Lena?" Hugh inquired.

"No," replied Mr. Cook. "Karl and I asked them all, and not one of them
had even seen her. It's a peculiar thing."

"I wonder if our friend the fake detective could have done it."

"He wasn't the feller you caught, was he?" asked Riley.

"No," said Bob. "Our man had whiskers, didn't he, Hugh?"

"Yes," said Hugh.

"They may have been false," suggested the sergeant. "You've got
false ones on."

"And they still itch terribly."

"Why don't you take them off?" inquired Mr. Cook. "I guess you won't need
them any more to-night, will you?"

"That depends on what is going to happen," said Bob. "Have you any plans,
Sergeant?"

"I wish I had," exclaimed Riley. "What I want to find out is where
this gang has its headquarters. When I know that I'll go there and
pay a call."

"I know where it is," said Bob.

"You do?" demanded the sergeant in surprise. "What are you two anyway; a
couple of young Sherlock Holmes?"

"Not at all," laughed Bob. "We are suspicious of a certain house though,
and it might be worth while to go up there and take a look around."

"That's the stuff," exclaimed Riley eagerly. "I'll swear you all in
as deputy sheriffs, and we'll get guns for yez and go up just as soon
as we can."

"We're only suspicious of this house, you know," said Bob.

"Where is it?"

"Twelve eighty-two Elm Street."

"I heard Heinrich say something about Elm Street," exclaimed Riley.
"Your clue may be a good one after all."

"Poor old Heinie," murmured Bob.

"Poor old nothing," cried Riley. "Who feels sorry for a German plotter?"

"But Heinie was stupid and they probably made a fool of him."

"The fact remains, however, Bob," said Mr. Cook, "that Heinrich evidently
was in with this gang and therefore he ought to be punished."

"You're dead right, Mr. Cook," exclaimed the sergeant. "No matter whether
a man's been made a fool of or not, if he's dangerous he ought to be
locked up."

"I suppose so," Bob agreed. "I feel sorry for him though, more sorry than
I do for Lena. She has more brains than Heinie and ought to know better."

"Meanwhile we ought to be on our way to Elm Street," exclaimed Sergeant
Riley. "Come on, boys, let's get started."




CHAPTER XXVII

A RAID AND A SURPRISE


Mr. Cook's automobile was still standing outside, and a few moments later
the little party of four were seated in it and on their way to the police
station. Bob was at the wheel.

Upon their arrival it was the work of only a few moments to have Mr. Cook
and the two boys sworn in as deputy sheriffs. Bob and Hugh retired to the
wash room and after more or less trouble succeeded in removing the false
crop of hair from their faces.

Sergeant Riley ordered two policemen in uniform to go with them, and when
Mr. Cook, Bob and Hugh had been equipped with pistols and heavy night
sticks, the band, now increased to six, were ready to proceed. They used
the Cooks' car again and presently were gliding silently along in the
direction of Elm Street.

Two blocks distant from number twelve eighty-two Bob stopped the car and
every one got out. A short consultation was held and it was decided to
separate. Consequently Mr. Cook, Hugh, and one of the policemen went
down a side street in order to go around the block and approach the house
from the opposite direction. Bob, Sergeant Riley, and the other policeman
were to wait a few moments and then move on up Elm Street. It was thought
best to have Bob with one party and Hugh with the other as both boys knew
the house and could lead the way with no possibility of mistake.

It was exciting work and Bob and Hugh both felt very important and
elated at being allowed to accompany the officers on this raid.
Furthermore they were going to see the inside of the mysterious stucco
house, and perhaps clear up the whole mystery of the German plot and spy
system in High Ridge.

After a few moments' wait Bob, Sergeant Riley, and the policeman started
to move slowly up the street. They met no one on the way, for it was now
after midnight and people were mostly in bed. Only one house had a light
burning as far as they could see; that house was a white stucco one,
number twelve eighty-two and the light was on the third floor.

"Here come the others," whispered Bob to Sergeant Riley as they drew near
their destination.

Orders had already been given and every one knew what he was to do. One
of the policemen went around to the rear of the house and took his
position by the back door. Mr. Cook was to guard the front entrance, and
both men had instructions to do everything necessary to prevent the
escape of any of the inmates of the house.

The remaining four members of the party, led by Sergeant Riley, stole
noiselessly up the steps and approached the front door. Riley took a
bunch of keys from his pocket, inspected the lock, and then selected one
of his keys. At the first trial the lock responded; he grasped the door
knob and silently and, with extreme caution, pushed open the door.

The hallway was unlighted. Sergeant Riley took out his flashlight and
pressed the button on it for a second as he inspected the hall. He
uttered a low grunt of satisfaction as he noted that there was a carpet
on the floor, and also on the stairs leading to the second floor. That
meant their footsteps would not be heard. He beckoned to the others to
follow, and softly stepped inside.

Scarcely daring to breathe, the four raiders advanced. They made no noise
on the thick carpet, but a collision with a piece of furniture or a false
step might have ruined all their chances for success. Sergeant Riley was
in the lead, quick flashes from his pocket torch showing the way.

After what seemed hours they reached the second floor. Thus far nothing
had occurred to make them think that they had been discovered, but the
hardest part was yet to come. From the third floor came the sound of
voices and a shaft of light from an open door pierced the darkness of the
hallway. The men above were talking in German.

There was a brief halt and then Sergeant Riley stole forward again.
With breath in check and walking on tip-toe his three companions
followed. The open door above was about five or six feet distant from
the head of the stairs. They started up the last flight; the voices of
the men above seemed raised in anger, and though Bob of course could
not understand what was said, he thought that the tone of one of them
sounded strangely familiar.

Suddenly the stairs under Sergeant Riley's foot creaked. The little band
stopped short, their hearts pounding; every one gripped his revolver a
bit tighter and waited for developments. Apparently the noise had not
been heard, however, for the voices continued as before.

The advance was resumed and finally Sergeant Riley reached the top of
the stairs. He went a little farther and took his stand just beside
the opened door and barely out of the light. As the others came up
they stationed themselves directly behind the sergeant and close
against the wall.

It was a tense moment. Bob and Hugh could feel their hearts hammering so
that it seemed to the two boys the noise must be heard. Their faces were
pale, and frankly they were frightened. Suppose the men in the room
should outnumber them and overpower them? Certainly if they were the
spies and plotters they sought, they would be desperate. Then again it
was just possible that the men were peaceful citizens, and that the
affair would turn out to be a farce; that would be almost too
humiliating.

Suddenly Sergeant Riley stepped forward into the open doorway.

"Hands up!" he ordered sharply, covering the inmates of the room with his
pistol. His three companions crowded into the doorway alongside him.

There were three men seated about a table in the room, and they were
completely taken by surprise. They started to their feet with muttered
exclamations of anger and astonishment, staring with wide eyes at the
four pistols levelled at them from the doorway.

One man hesitated and made a move as if to reach around towards his hip
pocket, but Sergeant Riley was alert.

"None of that," he cried. "Put up your hands."

The man hastened to obey and together the three stood and faced their
captors. Sullen and angry they looked, and not one of them spoke.

"Now, Marshal," said Sergeant Riley, speaking to the policeman next to
him. "I wish you would be so good as to relieve these gentlemen of any
hardware they may have concealed about them."

While Riley and Bob and Hugh covered the three prisoners, the officer
went rapidly from one to another and took a revolver from each one of
them. He also examined their other pockets, but finding no additional
weapons returned to his post by the door.

While this little drama was being enacted Bob had a chance to look about
the room. It was scantily furnished, a table, four chairs, and a shelf
along the wall constituting its equipment. On the shelf were a dozen or
more bottles that looked as if they might contain chemicals; a square
black box stood on the table and also a brass spring and what resembled a
cord hanging from one side. Bob decided it was a bomb. From a nail in the
center of the ceiling a small alligator was suspended by its tail. Bob
recognized the missing Percy, and decided that this must be the
headquarters of the gang that had used an alligator as its symbol, and
traced a picture of it on all the notes and warnings they sent out.

While the furnishings of the room were interesting, the three men
captured were far more so, and as Bob saw one of them he experienced a
distinct shock. The first was a man with dark hair, weighing perhaps one
hundred and fifty pounds, and having a close-cropped mustache; the fake
detective beyond a doubt. The second was a thin, wiry individual with a
beard, and a swollen, red nose. He was the man who had escaped from his
and Hugh's hands at the factory, Bob decided. His nose was swollen where
Hugh had hit him. This must be the man who had set off the bomb.

The third prisoner was the one who furnished the surprise to Bob,
however. He was a man Bob had known for years, and liked, admired, and
trusted as well. He was Karl Hoffmann.

"Well," exclaimed Sergeant Riley, "it looks as if you men was through
with your work. Get out your handcuffs, Marshal."

Up till now not one of the prisoners had spoken. When they saw the
manacles being brought out, however, they shifted uneasily and
Karl spoke.

"Bob," he said. "This is all a mistake."

Bob would have liked to believe him but before he had an opportunity to
say anything Sergeant Riley spoke up. "Perhaps it is a mistake," he
exclaimed. "We can talk that over down at the police station better than
here, however."

There was now little left to do. The handcuffs were quickly attached to
the prisoners' wrists and Hugh was sent to the second floor to telephone
for the patrol wagon. The prisoners were marched downstairs, and Mr. Cook
and the other policeman were summoned. Mr. Cook was as shocked as Bob had
been to see Karl Hoffmann among those who had been captured in the raid.

There was nothing for it, however, but to see him loaded into the patrol
wagon and driven away to police headquarters.




CHAPTER XXVIII

CONCLUSION


Mr. Cook, with Bob and Hugh, returned home. They had been in the house
only a few moments when the telephone rang, and Mr. Cook answered it to
find Sergeant Riley on the wire.

"I want to come up and see yez," he said. "I've let one of your friends
out of jail and I'll bring him along with me if you don't mind."

He offered no further explanations, and the three friends were at a loss
to understand what his visit could mean and who the "friend" might be.

"It must be Karl," said Mr. Cook. "No one can convince me he's disloyal."

"I guess that's who it is all right," agreed Bob.

They discussed their experiences of the past two days, but no one was
able to offer any satisfactory explanation for the strange events through
which they had passed. There was only one thing of which they were
certain and that was that a band of men who were working for Germany had
been plotting against the peace and welfare of the United States.

It was not long, however, before Sergeant Riley arrived and every
one was greatly astonished to see that his companion was none other
than Heinrich.

"Yes," said the sergeant. "Here's your friend Heinrich back again, and I
guess he's here to stay this time."

Mr. Cook was a trifle cool in his greeting to the chauffeur. Not that
he did not like him, but he had hoped to see Karl with the police
sergeant. He had been convinced of Heinrich's guilt, while he had
considered Karl to be innocent. Furthermore Karl had been foreman of
the factory for a number of years and had proved himself a most
intelligent and valuable workman.

"Heinrich has a story to tell you," said Sergeant Riley.

"You confessed, did you, Heinrich?" asked Mr. Cook. He was under the
impression that he had confessed in order to save himself, and glad as he
was to have the mystery and uncertainty ended he did not like a
"tell-tale."

"He had nothing to confess," said Riley. "Tell your story, Heinrich."

"Well," began Heinrich nervously, "in the first place you all suspected
me because I worked for Mr. Wernberg. Mr. Wernberg was working all the
time for the United States."

"What?" exclaimed Mr. Cook in surprise.

"Yes," said Heinrich, "that iss what he was doing. He knew there was
plots on foot and he knew every one in High Ridge was suspicious of him.
He decided to expose those plots and prove that he was a good American.
He hired Lena and me mit some others to help him."

"Lena, too, was all right?" demanded Bob.

"Certainly," exclaimed Heinrich. "Of course she iss all right. Mr.
Wernberg he knew who these plotters were, but he was not able to prove
anything about them. He also knew that they were meeting in that old
house out in the woods. The night before last he went out there in a big
gray roadster to search the house."

"I didn't know that was his car," said Bob in surprise.

"Yes," said Heinrich, "and I was mit him. You and Hugh followed us and we
knew it, so to scare you away I took the automobile and brought it home.
You see Mr. Wernberg wanted to do it all himself."

"We couldn't understand it," muttered Hugh. "To think that you were
fooling us all the time, Heinie."

"Yes," grinned the chauffeur, "I fool you all right. Well that night we
could not find anything so we left and Mr. Wernberg went back the next
afternoon to look around. One of the plotter's gang discovered that he
was there and tried to blow him up."

"But who locked us in that room?" demanded Bob.

"I did," said Heinrich. "I thought you was part of the German gang."

"Didn't you see us?"

"No, I only hear you talking. Then I fire one shot to give you a scare."

"And you almost blew Bob's head off," added Hugh.

"I tried to shoot high," said Heinrich. "Then I hurry away to tell Mr.
Wernberg that I had two of the plotters caught. When I was gone I guess
one of the plotters came there and you had a fight with him."

"The fake detective," exclaimed Bob.

"His name iss Kraus," said Heinrich. "He has a little mustache, and in
the afternoon he blew up the house, because he knew we were after him and
he wished to destroy all evidence."

"That's when Mr. Wernberg got hurt," said Mr. Cook. "What was he doing in
the house, Heinrich?" He was amazed at the way the mystery was clearing
itself up.

"As I told you," said Heinrich. "He was looking around for evidence
against the gang."

"Why didn't he notify the police if he was suspicious?"

"As I told you," repeated Heinrich patiently, "he wished to do all
himself and when he turned those men over to the police no one could say
he was forced to do it. They sent him lots of warning notes because they
knew he was after them."

"What did the alligator mean?"

"It iss the sign of a secret society; all Germans in High Ridge know
that. It was that snake Hoffmann who stole poor Percy to kill him and
hang him up in the room where they had their office."

"How long has Karl been a member of the gang?" asked Mr. Cook.

"Ever since Germany went to war with England," said Heinrich. "Nearly
three years."

"But he never talked as though he sided with Germany."

"The ones who mean trouble never do," said Heinrich. "Karl knew enough to
keep his mouth shut. You see you never suspected him."

"Tell me about Lena," exclaimed Mr. Cook. "Why was she meeting that man
Kraus down town tonight and going around with him if she was not working
with the gang?"

"She pretended to Karl Hoffmann that she was working mit them. All the
time she was acting as a spy for Mr. Wernberg. Because Karl Hoffmann was
in love with her he told her lots of things, and it was in that way we
got most of our information."

"Pretty clever, eh?" exclaimed Sergeant Riley, approvingly.

"There's another thing, Heinrich," said Mr. Cook. "Why wouldn't you read
what was written on that paper tonight?"

Heinrich looked sheepish. "I could not," he said. "Kraus had become
suspicious of Lena; he feared she was going to betray them and the note
was a warning to her. It said that if they were caught they would see to
it that she went to jail mit them. At that time you were all suspecting
poor Lena, and I was afraid you would send her to jail before she had a
chance to prove to you that she was loyal."

"You're in love with Lena, aren't you?" asked Mr. Cook.

"We are to be married," said Heinrich, proudly, his eyes shining.

"Did Karl suspect that Lena was treacherous?"

"I think not until he saw that note."

"He was going to read it to us though."

"He would not have read it," cried Heinrich hotly. "He would have made up
something, not what it said at all."

"Who shot Lena?"

"Kraus shot her. She was going to your office to warn you that your
factory was going to be blown up, and he shot her to prevent that."

"Who was the man with the whiskers?" asked Bob.

"His name iss Mueller. He iss the one who set off the bomb tonight."

"That's what we thought," exclaimed Bob. "Well, Hugh, you hit him one
good one anyway, didn't you?"

"I hope so," said Hugh.

"There was four of them altogether," said Heinrich. "Kraus, Mueller,
Hoffmann, and a man named Schaefer who went to blow up the railroad
bridge Friday night and has not been heard of since."

"We know where he is, don't we, Hugh?" laughed Bob.

"Where iss he?" demanded Heinrich.

"In jail, I guess," said Bob. "We caught him on the bridge with a bomb."

"Good boys," said Heinrich warmly.

"Why were you so angry when you had to go with father tonight?" asked
Bob. "Where was your engagement?"

"I was going with Lena to twelve eighty-two Elm Street, where Schaefer
lived. You see Lena was already a member of the gang, so they thought,
and I was to join too, so we both could watch them better."

"Somebody telephoned Lena about meeting them there this evening."

"Yes, it was Mueller. He thought he had a recruit in me."

"Well, Heinrich," said Mr. Cook, "I guess that explains pretty nearly
everything, and I'm sorry I ever suspected you." He shook hands warmly.

"Oh, that's all right," smiled Heinrich. "I had to get suspected with the
job I had. That was part of the game."

At that moment the door bell rang and Dr. Clarke was ushered in. "I
thought you might be interested in the hospital patients," he said. "Mr.
Wernberg will recover all right, and Lena is not badly hurt. She keeps
calling all the time for somebody named Heinrich. Do you know him?"

"Will you excuse me, Mr. Cook?" exclaimed Heinrich, and, without waiting
for a reply, he dashed out of the room, nearly falling over two chairs in
his haste to get away to the hospital.

"He seems to be in a hurry, doesn't he?" laughed the doctor.

"I must be going, too," said Sergeant Riley. "I have some boarders down
at my hotel who may need attention."

"Well, good-night, Sergeant," exclaimed Mr. Cook, shaking hands with the
doughty officer. "I'm sorry Hoffmann was mixed up in this business, but
I'm glad it's all cleared up. I hope we'll have no more trouble."

"Ye won't, as long as yez have two young fellers like Bob and Hugh
working for yez," exclaimed Riley. "The United States needs boys like
that; this war is going to be a long and hard one in my opinion."

"I'm afraid so," Mr. Cook agreed. "I guess we'll come out all right if we
all work hard and stick together though."

"That's it," exclaimed Riley. "We must all work together. Our personal
feelings don't count. It's what our country needs."

He said good night all around and went out.

       *       *       *       *       *

The next morning Bob was out in the yard inspecting a plot of ground
where he was going to have a garden. He could not enlist, but he was
going to "do his bit" by raising a few vegetables, and thus help to
supply the country with its necessary food. He heard a step behind him
and turned to see Frank Wernberg.

Frank held out his hand. "Shake hands with me, Bob," he exclaimed. "I
want to tell you that I was wrong about that the other day, and you
were right."

Bob responded heartily. "Yes," said Frank.

"I was dead wrong. I had thought from the way father talked that he was
pro-German, but I found out that he wasn't at all. When it came to a
question of deciding between his country and Germany there was never any
doubt about where he stood."

"I know that, Frank," said Bob. "I wish every one of German birth or
descent over here felt the same way."

"I think most of them do," said Frank.

"I guess that's right," Bob agreed. "Look at Lena and Heinrich."

"Well, all I wish now," exclaimed Frank, "is that we could enlist."

"So do I," cried Bob enthusiastically. "Wouldn't it be wonderful if you
and Hugh and I could enlist and go together?"

The new adventures are recorded in the story entitled,

BOB COOK AND THE GERMAN AIR FLEET.

THE END









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