Subjects: the river and i (sorted by popularity)
- Church architecture -- Rhine River Valley 109 downloads
- Cathedrals -- Rhine River Valley 109 downloads
- Danube River -- Description and travel 109 downloads
- Mississippi River Valley -- History -- Civil War, 1861-1865 107 downloads
- Thames River (England) -- Description and travel 106 downloads
- French -- Mississippi River Valley 104 downloads
- Ice on rivers, lakes, etc. -- Great Britain 104 downloads
- Indians of South America -- Amazon River Valley -- Languages 103 downloads
- Niagara River (N.Y. and Ont.) 103 downloads
- Shenandoah River Valley (Va. and W. Va.) -- History 102 downloads
- Wye, River (Wales and England) -- Description and travel 102 downloads
- Washington, George, 1732-1799 -- Travel -- Shenandoah River Valley (Va. and W. Va.) 101 downloads
- Shenandoah River Valley (Va. and W. Va.) -- Description and travel -- Early works to 1800 101 downloads
- Mississippi River Valley -- Juvenile fiction 101 downloads
- Hudson River (N.Y. and N.J.) -- Guidebooks 101 downloads
- Saguenay River Valley (Québec) 101 downloads
- Hunting -- Mississippi River Valley 99 downloads
- Saint Lawrence River Valley -- Fiction 97 downloads
- Colorado River (Colo.-Mexico) -- Discovery and exploration 96 downloads
- Colorado River Valley (Colo.-Mexico) -- Description and travel 96 downloads
- Colorado River (Colo.-Mexico) -- Description and travel 96 downloads
- Colorado River Valley (Colo.-Mexico) -- Discovery and exploration 96 downloads
- Colorado River (Mendoza and Neuquén-Buenos Aires, Argentina) 96 downloads
- Bièvre River (France) 96 downloads
- Yakima River Valley (Wash.) -- Antiquities 95 downloads