The Marie and James B. McMillan Photograph Collection (1900-1994) contains photographs of Marie and James B. McMillan and their families. The collection also includes photographs of their friends and professional associates, including journalist Hank Greenspun, Nevada civil rights pioneer J. David Hoggard, and entertainer Sammy Davis Jr. Marie McMillan is a former Las Vegas, Nevada flight instructor and one of the first women to work at the Nevada Test Site in Nye County, Nevada. James B. McMillan was the first African-American dentist to practice in Nevada, as well as a prominent Nevada civil rights leader.

Collection consists of an original manuscript, "Geology and Ore-Deposition at Tonopah, Nevada" by Josiah Edward Spurr (1870-1950) with hand-drawn diagrams, and letters discussing the donation of the manuscript. The manuscript, which was published in the journal Economic Geology in 1915, is a geological description of the Tonopah mining area; the Tonopah Mining Company is mentioned frequently. It is undated, but the publication date suggests it was written approximately 1913-1915.