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
- 62 more...
- 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.
- ItemWWANT074 - Northern Pacific steam locomotive 2264 at Black River, Washington, in 1945.
- ItemWWANT075 - Northern Pacific steam locomotive 2605 at Black River, Washington, circa 1940.
- ItemWWANT076 - Northern Pacific steam locomotive 252 at Seattle, Washington, circa 1935.
- ItemWWANT077 - Northern Pacific steam locomotive 2184 at Seattle, Washington, circa 1940.
- ItemWWANT078 - Northern Pacific steam locomotive leads a freight train at Seattle, Washington, circa 1935.
- 196 more...