Collection consists primarily of biographical notes, sketches, brand information, and obituaries concerning local cowboys and ranchers, which were collected and recorded for Wilson by his associate Charles Boucher. The files are arranged alphabetically. In addition, the collection contains a subject file on brands, several historical writings by Boucher and others, and numerous small notebooks, arranged chronologically, which contain notes for the biographical sketches, notes concerning Boucher's politics and philosophy, lists, and miscellany. [A biographical sketch of Dola Wilson is included in the accession record. Photographs of Range Riders were transferred to Photo Archives. Motion picture film was transferred by Photo Archives to the American Film Institute.]