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
- 73 more...
- ItemWWANT084 - Northern Pacific steam locomotive 227 at Black River, Washington, in 1939.
- ItemWWANT085 - Northern Pacific steam locomotive 2602 at Black River, Washington, in 1941.
- ItemWWANT086 - Northern Pacific steam locomotive 2193 at Black River, Washington, circa 1941.
- ItemWWANT087 - Northern Pacific steam locomotive 2245 at Black River, Washington, circa 1941.
- ItemWWANT088 - A Great Northern steam locomotive at Black River, Washington, circa 1941.
- ItemWWANT090 - Northern Pacific steam locomotive 2247 at Black River, Washington, circa 1941.
- ItemWWANT092 - Northern Pacific steam locomotive 2603 at Black River, Washington, circa 1941.
- ItemWWANT094 - Northern Pacific steam locomotive 2262 at Black River, Washington, circa 1941.
- ItemWWANT095 - A Northern Pacific steam locomotive near Seattle, Washington, circa 1935.
- 186 more...