The Allen mss., 800-1972, consists of manuscript pieces collected by William Edward David Allen, 1901-1973, foreign service officer, businessman, and author, and his own writings about Georgian history.
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.