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
- 30 more...
- ItemWWASPS-PC1-019 - Spokane, Portland and Seattle (SP&S) Mail and Baggage Car Number 46, Portland, Oregon, undated
- ItemWWASPS-PC1-020 - Spokane, Portland and Seattle (SP&S) Mail and Baggage Car Number 46, Portland, Oregon, June 1968
- ItemWWASPS-PC1-022 - Spokane, Portland and Seattle (SP&S) Mail Storage Car Number 52 (3rd), Portland, Oregon, undated
- ItemWWASPS-PC1-023 - Spokane, Portland and Seattle (SP&S) Mail Storage Car Number 55, Portland, Oregon, August 1969
- ItemWWASPS-PC1-028 - Spokane, Portland and Seattle (SP&S) Mail Storage Car Number 56, Portland, Oregon, undated
- ItemWWASPS-PC1-029 - Spokane, Portland and Seattle (SP&S) Mail Storage Car Number 57, Portland, Oregon, undated
- ItemWWASPS-PC1-033 - Spokane, Portland and Seattle (SP&S) Baggage Car Number 80, undated
- ItemWWASPS-PC1-034 - Spokane, Portland and Seattle (SP&S) Baggage Car Number 90, Portland, Oregon, undated
- ItemWWASPS-PC1-035 - Spokane, Portland and Seattle (SP&S) Business Car Number 99 (2nd), Portland, Oregon, August 1943
- 48 more...