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
- 193 more...
- ItemJATGLoco_2501l - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501m - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501nKSS-InterbayCPostWWII - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501o - Great Northern Railway steam locomotive 2501 in Washington State, undated.
- ItemJATGLoco_2501pNBallardC1925 - Great Northern Railway steam locomotive 2501 at Ballard, Washington in 1925.
- ItemJATGLoco_2501qBlackriverCPostWWII - Great Northern Railway steam locomotive 2501 at Black River, Washington, undated.
- ItemJATGLoco_2502 - Great Northern Railway steam locomotive 2502 in Washington State, undated.
- ItemJATGLoco_2502a - Great Northern Railway steam locomotive 2502 in Washington State, undated.
- ItemJATGLoco_2502bNBallardC1924 - Great Northern Railway steam locomotive 2502 at Ballard, Washington in 1924.
- 125 more...