The Helen J. Stewart Papers (1869-1978) document the life of Las Vegas, Nevada pioneer, Helen J. Stewart. It includes correspondence between Stewart and her children as well as various family legal papers and certificates. The collection also contains Helen J. Stewart's 70th birthday scrapbook, a ledger, and a day book from 1904-1919, as well as several photograph albums and information related to the family burial plot.

The Linda Miller Papers (2008-2024) document Dr. Linda Miller's historic preservation work in Las Vegas, Nevada including her work portraying early Las Vegas resident, Helen J. Stewart, at historical events across Southern Nevada. The collection documents Miller's efforts to erect a statue of Helen Stewart at the Las Vegas, Nevada Old Mormon Fort, as well as her contributions to the programming for Sarah Winnemucca Day in 2018. The collection documents Miller's appearances as Helen J. Stewart through photographs, pamphlets, video recordings, digital files, and curriculum used for her outreach work. The collection also documents Dr. Miller's activities as chair for the Nevada State Society chapter of the National Society of the Daughters of the American Revolution (NSDAR) and as a member of the National Society Sons and Daughters of the Pilgrims Southern Nevada Chapter.

The Sandstone Ranch Collection is comprised of bank statements, letters, correspondence, and photographs relating to the Wilson family from 1907 to 1941. The collection includes information about the financial aspect of the Wilson Ranch, later renamed the Sandstone Ranch, located outside of Las Vegas, Nevada. The collection also includes information about the personal lives of those working on the including contracts about grazing cattle, selling cattle, and appropriation of water.