The Tonopah and Tidewater Railroad Records (1905-1977) contain correspondence, purchase requisitions, bills of lading, freight reports, and waybills. Also included are a ledger book, a rubber stamp, and a booklet, "Diagrams of Locomotives and Tenders." Incorporated in 1904, the Tonopah and Tidewater Railroad operated for 35 years, connecting Ludlow, California with Beatty, Nevada by way of Death Valley on the Santa Fe Railroad main line. The records are concentrated on the later years of the railroad from 1930 to 1940.

The Frank Williams Papers on Early Nevada (1892-1946) consists of manuscripts written for the most part by Frank Williams, an early resident of Southern Nevada. The collection includes Williams' autobiography as well as histories of Goodsprings, Potosi Mine, Mesquite Valley, and the Yellow Pine Mining districts. Finally, this collection contains reports and material reflecting Frank Williams' two terms as University Regent (1909-1912 and 1923-1942) at the University of Nevada, Reno, and his four terms in the Nevada State Assembly.