Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2006 - People--Non-railroad
- ItemJATGSelfPortrait - Frequent Great Northern Railway photographer James Turner in Washington State, undated.
- ItemJATGShowShed_Track - Frequent Great Northern Railway photographer James Turner in Washington State, undated.
- ItemJATGTracksHorses - Unknown rider and pack horses walking along Great Northern Railway track in Washington State, undated.