Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 111 more...
- ItemWWANT143 - Northern Pacific steam locomotive 215 at Seattle, Washington, in 1924.
- ItemWWANT144 - Northern Pacific steam locomotive 215 at Argo, Washington, circa 1925.
- ItemWWANT145 - Northern Pacific steam locomotive 245 at Seattle, Washington, circa 1925.
- ItemWWANT146 - Northern Pacific steam locomotive 234 at Seattle, Washington, in 1925.
- ItemWWANT147 - Northern Pacific steam locomotive 246 at Argo, Washington, circa 1925.
- ItemWWANT148 - Northern Pacific steam locomotive 246 at Seattle, Washington, circa 1925.
- ItemWWANT149 - Northern Pacific steam locomotive 252at Seattle, Washington, in 1941.
- ItemWWANT150 - Northern Pacific steam locomotive 900 at Seattle, Washington, circa 1925.
- ItemWWANT151 - Northern Pacific steam locomotive 916 at Seattle, Washington, circa 1925.
- 148 more...