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Topic
- Steamboats 13
- Bodies of water 11
- Northwest, Pacific 11
- Photography 11
- Rivers 11
- Riparian areas 7
- Postcards 5
- Locks (Hydraulic engineering) 4
- Mountains 4
- Rapids 4
- Boats and boating 2
- Canals 2
- Discovery and exploration 2
- Explorers 2
- Maps 2
- Transportation--Passenger traffic 2
- Boatbuilding 1
- Bridges 1
- Canada, Western 1
- Carriages and carts 1