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 3004 - Railroad Passenger Cars
- 81 more...
- ItemWWASPS-PC1-088 - Spokane, Portland and Seattle (SP&S) Cafe-Reserved Seat Coach Number 558, Portland, Oregon, 1939
- ItemWWASPS-PC1-089 - Spokane, Portland and Seattle (SP&S) Cafe-Reserved Seat Coach Number 558, Portland, Oregon, 1939
- ItemWWASPS-PC1-090 - Spokane, Portland and Seattle (SP&S) Cafe-Reserved Seat Coach Number 558, Washougal, Washington, July 8, 1947
- ItemWWASPS-PC1-094 - Spokane, Portland and Seattle (SP&S) passenger coaches, undated
- ItemWWASPS-PC1-095 - Spokane, Portland and Seattle (SP&S) Observation Car, undated
- ItemWWASPS-PC1-097 - Spokane, Portland and Seattle (SP&S) Lounge-Sleeping Car "Mount Adams", Portland, Oregon, August 10, 1949