The collection includes photographs, mostly from the 1920s to the 1940s. They include portraits and candid shots, including several of Duran's Japanese American neighbors in the years leading up to World War II. There are documents of a personal nature, as well as from the groups Duran was involved in, such as the Alianza Hispano-Americana, the International Ladies' Garment Workers' Union, and the Community Service Organization. There is a small amount of correspondence, and some writings. Perhaps most notable is Duran's first-hand account of the Battle of Columbus, Pancho Villa's 1916 raid into the United States, as well as its aftermath and Duran's 1973 meeting with Luz Corral, Villa's widow. There is also some material on her businesses in Lancaster, CA, and other events in the city, such as the construction of the prison there.