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
- 57 more...
- ItemWWANT065 - Northern Pacific steam locomotive 2261 at Allentown, Washington, circa 1941.
- ItemWWANT066 - Northern Pacific steam locomotive 2262 at Allentown, Washington, circa 1941.
- ItemWWANT067 - Northern Pacific steam locomotive 1381 at Allentown, Washington, in 1941.
- ItemWWANT068 - Northern Pacific steam locomotive 1678 at Allentown, Washington, in 1941.
- ItemWWANT069 - Northern Pacific steam locomotive 2241 at Allentown, Washington, circa 1941.
- ItemWWANT070 - Northern Pacific steam locomotive 1538 at Black River, Washington, circa 1941.
- ItemWWANT071 - Northern Pacific steam locomotive 227 at Black River, Washington, circa 1925.
- ItemWWANT072 - Northern Pacific steam locomotive 2262 at Black River, Washington, circa 1941.
- ItemWWANT073 - Northern Pacific steam locomotive 252 at Black River, Washington, circa 1935.
- 202 more...