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
- 189 more...
- ItemWWANT224 - Northern Pacific steam locomotive 1783 at Black River, Washington, circa 1941.
- ItemWWANT226 - Northern Pacific steam locomotive 1834 at Auburn, Washington, circa 1925.
- ItemWWANT227 - Northern Pacific steam locomotive 1840 at Auburn, Washington, circa 1925.
- ItemWWANT228 - Northern Pacific steam locomotive 1841 at Auburn, Washington, circa 1925.
- ItemWWANT229 - Northern Pacific steam locomotive 1841 at Auburn, Washington, circa 1925.
- ItemWWANT230 - Northern Pacific steam locomotive 1841 at Auburn, Washington, circa 1925.
- ItemWWANT231 - Northern Pacific steam locomotive 1841 at Auburn, Washington, circa 1925.
- ItemWWANT232 - Northern Pacific steam locomotive 1841 at Auburn, Washington, in 1924.
- ItemWWANT233 - Northern Pacific steam locomotive 1843 at Auburn, Washington, in 1924.
- 70 more...