The collection contains materials (1967-1991) collected by Sheilagh Brooks predominantly during her time serving on various boards and committees under the Nevada Division of Historic Preservation and Archaeology. Materials include agendas, meeting minutes, correspondence, administrative reports, policies, budget plans, grant applications and guidelines for various federal and state departments. The collection also contains the applications of Nevada sites for the National Register of Historic Places.

Oral history interview with John Cahlan conducted by an unknown interviewer in 1975 for the Ralph Roske Oral History Project on Early Las Vegas. Cahlan discusses the Nevada Test Site and the role of Basic Magnesium for the atomic testing. Cahlan additionally discusses the image of Las Vegas, Nevada as the entertainment capital of the world and the work of journalism in shifting the image to the recreational aspects of the area, such as Lake Mead and Mount Charleston.