Consists of family correspondence, general correspondence, diaries, and memorabilia of the Jarves family. Major family correspondents are James Jackson Jarves, his first wife, Elizabeth Russell Swain Jarves, his son Horatio Deming Jarves, and his second wife Isabel Heyden Jarves. Collection also contains working files of Francis Steegmuller, author of The Two Lives of James Jackson Jarves, 1951.