Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3010 - Miscellaneous
- ItemWWASPSL1-005 - Riverfront at Portland, Oregon, undated
- ItemWWASPSL1-007 - Lumber Schooner, undated
- ItemWWASPSL2-053 - Steamboats in the Cascade Locks, Cascade Locks, Oregon, February 17, 1907
- ItemWWASPSL2-054 - Steamboats in the Cascade Locks, Cascade Locks, Oregon, February 17, 1907
- ItemWWASPSL2-057 - Steamboat "Bailey Gatzert" approaching the Cascade Locks, Cascade Locks, Oregon, April 11, 1913
- 14 more...