The Arnold Studio Photographs consists of images showing street, harvest, and snow scenes and buildings in Walla Walla, Washington, as well as scenes on the Whitman College campus. Photographs of the Whitman Centennial and Pendleton Round-up are included. The collection also contains a photograph album that was sent to Washington, D.C. to document need for the Mill Creek Project following the 1931 Walla Walla flood.