The McCall Family Papers are comprised primarily of family photographs and correspondence from 1910-1970. The materials concentrate on Quannah McCall and his daughter, Connie McCall, both were well known dentists in Southern Nevada. The materials also contain letters, postcards, holiday cards, and birth, death, and marriage certificates, as well as school commencement announcements for family members.

The Albert S. Henderson Papers (1879-1962), document his career and service as a district judge in Las Vegas, Nevada. Included are correspondence, a personal statement from his election campaign, certificates and proclamations, his memorial book, numerous newspaper clippings, an 1879 edition of Eureka and Its Resources, and various ephemera: union cards, name tags, and election cards.

The Hazel Baker Denton Photograph Collection (1910-1961) is comprised of photographic prints and one negative of the Denton family and friends, primarily taken in Nevada and Utah. Many photographs depict life in small Nevada towns, particularly Caliente. Photographs also depict Utah, Oregon, Washington D.C., and California, and unidentified desert and forest landscapes throughout the American West.

The Union Pacific Railroad Photographs depict the Union Pacific Railroad Company's tracks, depots, locomotives, and stations in Southern Nevada and Southern California from 1904 to 1973. The photographs primarily depict Union Pacific officials in Las Vegas, Nevada, construction of Boulder City, Nevada and the Hoover (Boulder) Dam, hotels and casinos in Las Vegas, and the aftermath of flooding in 1938 that damaged Union Pacific tracks.