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
- 195 more...
- ItemWWANT231 - Northern Pacific steam locomotive 1841 at Auburn, Washington, circa 1925.
- ItemWWANT232 - Northern Pacific steam locomotive 1841 at Auburn, Washington, in 1924.
- ItemWWANT233 - Northern Pacific steam locomotive 1843 at Auburn, Washington, in 1924.
- ItemWWANT234 - Northern Pacific steam locomotive 1843 at Auburn, Washington, circa 1925.
- ItemWWANT235 - Northern Pacific steam locomotive 1843 at Auburn, Washington, in 1925.
- ItemWWANT236 - Northern Pacific steam locomotive 1843 at Auburn, Washington, circa 1925.
- ItemWWANT237 - Northern Pacific steam locomotive 2107 at Seattle, Washington, in 1924.
- ItemWWANT238 - Northern Pacific steam locomotive 2107 at Argo, Washington, in 1925.
- ItemWWANT239 - Northern Pacific steam locomotive 2108 at Argo, Washington, in 1925.
- 64 more...