Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 186 more...
- ItemJATGLoco_2501e - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501f - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501gBlackriverC1934 - Great Northern Railway steam locomotive 2501 at Black River, Washington in 1934.
- ItemJATGLoco_2501h - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501iGeorgetownC1928 - Great Northern Railway steam locomotive 2501 at Georgetown, Washington in 1928.
- ItemJATGLoco_2501j - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501kNBlackriverCPostWWII - Great Northern Railway steam locomotive 2501 at Black River, Washington, undated.
- ItemJATGLoco_2501l - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501m - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- 134 more...