Correspondence, memoranda, and legal and financial documents of Keppel. The files deal largely with Keppel's personal and professional life during his tenure as President of the Carnegie Corporation, and also include some files from his years as Newton D. Baker's Third Assistant Secretary of War, and as Dean of Columbia College. There are extensive files of correspondence from and to Keppel's parents and children, as well as files concerning his activities in organizations such as the Century and Columbia University Clubs. The letters from friends and business associates concern American education, politics, business, and cultural life, particularly in the New York metropolitan area, from 1900 to 1943.