Typed summary of interview and corrections with daughter, Anne Louise McCain Christianson, mentioning the Aurora Borealis Farm, Datus Smith, Charles Sutton, A.F. Sutton, father-in-law to McCain, various McCain and Sutton family members; genealogical material on the McCain family and typed copies of newspaper clippings. Handwritten reminiscence (3 leaves) by Martha Sutton McCain Simpson, his widow, about their first meeting and marriage. Brief typed family history (1 leaf) of McCain's sister, Mary Elizabeth, and parents, William Alexander and Maria Laura McAllister by Aimee Hemingway, William's niece. Application form for D.A.R. membership from Katie Lou McCain, William's niece, which includes McCain genealogy. "History of the McCain family" (3 leaves) by Ned McNeely.