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
- 248 more...
- ItemWWANT286 - Northern Pacific steam locomotive number 2626 at Black River, Washington, circa 1933.
- ItemWWANT287 - Northern Pacific steam locomotive number 2626 at Allentown, Washington, circa 1939.
- ItemWWANT288 - Northern Pacific steam locomotive number 4005 at Lester, Washington, 1939.
- ItemWWANT289 - Northern Pacific steam locomotive number 2626 at Georgetown, Washington, circa 1950.
- ItemWWANT290 - Northern Pacific steam locomotive number 4006 at Martin, Washington, 1924.
- ItemWWANT291 - Northern Pacific steam locomotive number 4005 at Martin, Washington, 1924.
- ItemWWANT292 - Northern Pacific steam locomotive number 4008 at Kanaskat, Washington, 13721.
- ItemWWANT293 - Northern Pacific steam locomotive number 4006 at Stampede, Washington, 9677.
- ItemWWANT294 - Northern Pacific steam locomotive number 4009 at Auburn, Washington, circa 1928.
- 10 more...