Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2005 - Landscape photography
- ItemWWASPSL2-040 - Spokane, Portland, and Seattle (SP&S) Beacon Rock on the Columbia River, near Skamania, Washington, undated
- ItemWWASPSL2-048 - Cascades of the Columbia, Cascades, Washington, undated
- ItemWWASPSL2-049 - Cascades of the Columbia, Cascades, Washington, undated
- ItemWWASPSL2-055 - Bonneville Dam, North Bonneville, Washington, undated
- ItemWWASPSL2-056 - Bonneville Dam, North Bonneville, Washington, undated
- 23 more...