On February 24, 1975, Kathleen Kasmir interviewed Marion Brooks (born 1913 in Santa Ana, California) about his life in Southern Nevada and his work as a mining engineer. Brooks first talks about his background before talking extensively about his early work in mining. Brooks also mentions some of the professional mining societies of which he was a part, and the two then move on to discuss gambling, recreational activities, and the atomic testing. Other topics covered during the interview include the price of groceries and food, the El Rancho Vegas, social changes, population growth, and environmental changes. The end of the interview then shifts back to Brooks’ work in mining at Blue Diamond and then a discussion on the possible locations of three lost mines.

On March 5, 1978, collector Wendy Christian interviewed truck driver Henry Clay Davis (born April 19, 1900 in Irondale, Virginia) in his home in Las Vegas, Nevada. This interview covers Henry Clay Davis’s personal life history as a resident of Las Vegas, which includes hunting and fishing. He also discusses employment, the railroad, old hotels, the Davis Dam, and Lake Mead. Additionally, he offers a detailed description of the Helldorado.