The Butch Cassidy collection (1984-1986) contains manuscripts, articles and a letter that relate to the life of "Butch Cassidy" whose real name was Robert Leroy Parker,(1866-1908?). Cassidy is one of the most famous American bank and train robbers. Butch was associated with the "Wild Bunch" and "Hole in the Wall" Gangs.
The Harry Longabaugh Jr. papers (1970) contain a transcript of a speech given by Longabaugh on 25 June 1970, at Weber County Library, Ogden, Utah. Longabaugh claims to be the son of Harry Longabaugh, the Sundance Kid. In this speech he talks about Butch Cassidy, the Sundance Kid, and their respective gang, and dispels some of the myths brought on by Twentieth Century Fox's movie, Butch Cassidy and the Sundance Kid.