The Raymond Brooks Papers on Mining (approximately 1900-1955) document Brooks' time working in the mining and railroad industries in central and southern Nevada, as well as in Rhodesia (Zimbabwe). Brooks worked as a mining engineer and executive in many Nevada mining districts, including Goldfield, Tonopah, Bullfrog, Rawhide, Chloride, Beatty, Wonder, and Searchlight. The collection consists of photographs, photograph albums, ledgers and mining certificates, correspondence, and publications that all relate to mining. Notable figures mentioned in material throughout the collection include George Nixon, George Wingfield, William MacMaster, and James Butler.

The C. A. Earle Rinker Photograph Collection of Goldfield, Nevada (approximately 1900-1915) contains individual black-and-white photographic prints, photographic albums, black-and-white and tinted postcards, and photographic negatives that document the history of early twentieth century Goldfield, Nevada. The images include photographic prints of Goldfield and surrounding areas during its peak years of 1906-1910; postcards showing scenes of Goldfield, Tonopah, and other areas in central Nevada; and negatives that contain images of Rinker's family and homelife in Indiana and Illinois.