The Appleton-Century mss., 1846-1962, consists of the office files of the publishing company, its two predecessors, D. Appleton & Co., and the Century Co., and to a small extent its successor, Appleton-Century Crofts, Inc.
The Stone mss., 1888-1965, are the papers of Meta (Fuller) Stone. They consist of her writings, including an autobioraphical novel and poetry, and her correspondence with her friends and with her (ex-)husband Upton Beall Sinclair, 1908-1917, much of it concerned with her divorce.
The Ehrmann mss., 1899-1926, consists of letters to Max Ehrmann, 1872-1945, author, from Eugene Victor Debs, Frank Harris and Upton Beall Sinclair, and Mrs. A. Schember.