Consists primarily of subject files that Parrish drew on for his writings about various historical topics such as the Chamizal, Mexican land grants, the Mexican Revolution of 1911-1920, and several Native American Indian tribes including the Apaches, Tiguas, and Yaquis. Materials include research notes, correspondence, brochures, newspaper clippings, annotated bibliographies, unpublished manuscripts, photographs (taken by Parrish and others), a scrapbook, photostats, an oversized map, magazine articles, postcards, negatives, and color transparencies.
