The Ernest Mitchell Pratt Photographs (approximately 1932-1936) consist of black-and-white photographic prints, signed and unsigned, taken by Pratt while Hoover Dam was under construction. Many prints are signed and mounted, and two are noted as award-winning photographs shown at the Annual International Salon of Camera Pictorialists in Los Angeles, California. There are additional working prints included alongside the final prints for most of the scenes. Also included in the collection is one small photograph of Pratt. This collection was formerly known as the Price Photograph Collection.

The Paul May Photograph Collection (1969) consists of black-and-white and color photographic prints. The images primarily depict Nevada Assemblyman Paul May alongside Nevadan senators and congressmen, including Senator Paul Laxalt. Other images are portraits of May.