Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2006 - People--Non-railroad
- ItemWWASPSL7-127 - Spokane, Portland, and Seattle (SP&S) Tourists, Washington State, undated
- ItemWWASPSL7-129 - Tourists, Washington State, undated
- ItemWWASPSL9-008 - Spokane, Portland, and Seattle (SP&S) Army Camp, June 1927
- ItemWWASPSL9-027 - US Army Camp, undated
- ItemWWASPSL9-033 - Spokane, Portland & Seattle (SP&S) Depot and Passenger Train at , Seaside, Oregon, undated
- ItemWWASPSL9-039 - Spokane, Portland & Seattle (SP&S) Depot and Passenger Train at Seaside, Oregon, circa 1931
- 3 more...