Correspondence, manuscripts, contracts, memos., and photographs. The correspondence pertains to the publications of numerous important fiction and non-fiction authors. The files are particularly strong for authors included in two important historical series"The New American Nation" Richard B. Morris and Henry S. Commager, editors; and "The Rise of Modern Europe" William L. Langer, editor. The files of Cass Canfield Sr. contain substantial material on Planned Parenthood and International Planned Parenthood.