Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3009 - Railroads - Servicing facilities
- ItemWWAPC0304 - Seattle and Walla Walla Railroad servicing facilities and employees at Seattle, Washington, circa 1879.
- ItemWWAPC0305 - Columbia and Puget Sound Railroad servicing facilities at Seattle, Washington, circa 1890.
- ItemWWAPC0313 - Columbia and Puget Sound Railroad servicing facilities at Seattle, Washington, circa 1915.
- ItemWWAPC0314 - Columbia and Puget Sound Railroad servicing facilities at Seattle, Washington, circa 1915.
- ItemWWAPC0316 - Columbia and Puget Sound Railroad servicing facilities at Seattle, Washington, circa 1912.