Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3013 - Railroad Accidents
- ItemWWAPC0088 - Columbia and Puget Sound Railroad accident at Hobart, Washington in 1894.
- ItemWWAPC0108 - Columbia and Puget Sound Railroad accident at Newcastle, Washington, circa 1910.
- ItemWWAPC0118 - Columbia and Puget Sound Railroad accident in Washington state, circa 1910.
- ItemWWAPC0532 - Columbia and Puget Sound Railroad accident at Maple Valley, Washington, circa 1910.