Biographical information on Robert J. McCaig and his family, professional and personal correspondence, research materials McCaig collected for his writing projects, records and correspondence from his involvement with the Western Writers of America, a small set of family photographs, and a selection of McCaig's novels and short story manuscripts. Biographical materials include the annotator's biographical sketch of McCaig, newspaper articles about McCaig family members, pamphlets on the McCaig family name, and legal paperwork for Bob and Edith McCaig as well as the Engren family (McCaig's in-laws). Correspondence topics include publishing industry contacts, personal exchanges, family business matters, and community projects. Subject files contain materials Robert McCaig collected as research references for his writing projects, articles he wrote on the craft of writing, as well as materials related to his involvement with the Western Writers of America. This collection also includes the small portion of family photographs submitted with the original donations. In addition, the collection includes original manuscripts for two novels, The Rangemaster (1958) and The Shadow Maker (1970) and eight short stories: "Pop and the Cockeyed Windmill", "Trouble on Circuit 13", "Flame Across the Night", "Fools Are My Theme", "The Badger from Ballyduff", "Green Light for Grogan", "The Fall Guy", and "Turmoil at Tinasket."