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 Woodrow Wilson Photograph Collection consists of black-and-white photographic prints and negatives. The images depict black elected government leaders attending the first Conference of Black Elected Officials held in Washington, D.C. in September 1969. Of particular interest are images of Nevada's first black state legislator, Woodrow Wilson; Georgia state representative, Julian Bond; and President Richard Nixon.

The Hotel Last Frontier Photograph Collection contains photographic prints, negatives, and slides depicting scenes inside and outside the Hotel Last Frontier in Las Vegas, Nevada between approximately 1940 and 1969. The collection also includes photographs under its alternate names: the Last Frontier and the New Frontier Hotel and Casino.

The Thomas L. Morgan Real Estate Development Records (1971-1997) relate to commercial and residential real estate development, primarily in Los Angeles, California and Las Vegas and Henderson, Nevada. Materials consist of Hughes Development/Summa Corporation projects including the Hughes Center and Playa Vista in Los Angeles, California, and Summerlin and the Hughes Center in Las Vegas, Nevada. There are also extensive records related to the financing and development of Green Valley Ranch and Lake Las Vegas, projects Morgan helped develop through his private company, Thomas Morgan & Associates. Also represented are a number of casino-related projects for the Sands, the Frontier, the Landmark, and the Westgate hotel-casinos. Additional materials include general business records, handwritten notes and memoranda, and correspondence; Summa financial papers and forecasts; books on finance and a 1982 Desert Inn Master Plan architectural portfolio.

The J. T. McWilliams Photograph Collection contains photographs and postcards from Nevada and Southern California from approximately 1900 to 1970. The materials include postcards depicting Las Vegas, Nevada casinos such as El Rancho Vegas and the Golden Nugget Gambling Hall. The materials also include postcards depicting towns and scenes in Nevada such as Carson City, Rhyolite, Red Rock Canyon, and covered wagons traveling to Las Vegas. Lastly, the materials contain several photographs of the McWilliams family, possibly while they were living in what is now Las Vegas, Nevada.

The Sherwin “Scoop” Garside Photographs contain photographs from journalist and photographer “Scoop” Garside from 1907 to 1969. The photographs primarily depict events and buildings in Southern Nevada, including construction of the Hoover (Boulder) Dam, the Helldorado Parade in Las Vegas, Nevada, hotels and casinos, schools, and social events. The photographs also depict the Garside Family, including Las Vegas Review-Journal owner Frank Garside, “Scoop” Garside’s father.