The Donn Arden Photographs (approximately 1920-1989) contain photographs, negatives, and photographic slides of dancer and choreographer Donn Arden. The photographs primarily document Arden's life as a dancer and choreographer in Las Vegas, Nevada and in Paris, France, including performances at the Stardust Hotel, Desert Inn, and MGM Grand in Las Vegas and the Lido in Paris. The photographs also depict rehearsals, dancers, showgirls, Arden's friends and family, and performance locations.

The Union Pacific Railroad Collection (1828-1986) is comprised of the original corporate records of the Union Pacific Railroad's operations in Southern Nevada, Utah, and Southern California, particularly focusing on Las Vegas and Los Angeles. The collection documents the purchase of Stewart ranch and the construction of the original depot and town which became modern Las Vegas. The collection also contains the records of the Las Vegas Land & Water Company (LVL&W), a subsidiary of the railroad formed in 1905 to handle the railroad's land transactions. The collection contains office files, correspondence, reports, leases, various legal, governmental and financial document, the collection contains large and small format maps, architectural and engineering drawings, published technical reports, railroad operational manuals, bound legal briefs, ledgers, and payroll and receipt books. The collection also includes the personal files of Walter Bracken, the Union Pacific's special representative in Nevada and vice president of the Las Vegas Land and Water Company, and a paper index of the collection materials.