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
- ItemWWANT002 - Northern Pacific steam locomotive 2264 in Seattle, Washington, circa 1940.
- ItemWWANT003 - Northern Pacific steam locomotive 2247 in Seattle, Washington, in 1939.
- ItemWWANT004 - Northern Pacific steam locomotive 2194 in Seattle, Washington, circa 1940.
- ItemWWANT005 - Northern Pacific steam locomotive 246 in Seattle, Washington, circa 1925.
- ItemWWANT006 - Northern Pacific steam locomotive 2264 in Seattle, Washington, circa 1940.
- ItemWWANT007 - Northern Pacific steam locomotive 2249 in Seattle, Washington, circa 1940.
- ItemWWANT008 - Northern Pacific steam locomotive 2602 in Seattle, Washington, circa 1946.
- 261 more...