The James H. Down Jr. Photograph Collection (approximately 1915-1940) consists of black-and-white photographic prints and negatives, as well as color photographic slides and postcards. The images depict scenes in and around Las Vegas and Goodsprings, Nevada. Also included are Glenn Davis' photographs of the Hoover Dam (Boulder Dam), Black Canyon, the Colorado River, and Lake Mead. Most of the images portray the construction phases of the Hoover Dam.

The Elmo and Charlotte Ellsworth Photograph Collection (approximately 1940-1959) is comprised of black-and-white photographic prints and negatives. The images depict Charlotte and Elmo Ellsworth. Also included is an image of Elmo Ellsworth on horseback at the Las Vegas, Nevada airport for the arrival of the first United Airlines flight and an image of people at the Last Frontier Village in Las Vegas.

The Leslie H. Smith Papers (approximately 1920-2018) contains the personal papers of Leslie H. Smith, who grew up in Las Vegas, Nevada, and mainly documents his involvement with the Las Vegas High School Alumni Association organizing and attending the school's annual reunions. The collection includes personal papers, scrapbooks, and photographs documenting Smith's family, including his father Dr. J. D. Smith, his mother Ruth Weir Smith, and his sister Jeanne Smith Stewart. Reproductions of class photographs from the Las Vegas Grammar School (now known as the Historic Fifth Street School) where Smith attended elementary school are also included this collection.