The Thomas J. Osborne Photograph Collection (approximately 1890-1930) consists of black-and-white photographic prints, negatives, and slides. Images depict the family of Thomas J. Osborne, his law office, the family home, and views of the town of Pioche, Nevada and surrounding areas. Several images depict local mines and unidentified mine workers.

The Nevada Poetry Society Records are comprised of the Society's records dating from 1961 to 1973. Society organizer and president, Mildred Breedlove is featured prominently in the collection. Materials include Silver Strings: Nevada Poetry Society Anthology, a collection of poems commemorating Nevada's centennial year, individual poems from members, financial records, correspondence, and newsletters.

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.