Approximately 12,000 letters to Allan Nevins from various correspondents including James Truslow Adams, Franklin Delano Roosevelt, Harry S. Truman, Willa Cather, Frances Folsom Cleveland, Van Wyck Brooks, Robert Frost, Newton D. Baker, Archibald MacLeish, John D. Rockefeller, Jr., Carl Sandburg, and Henry Wallace; notes and typescripts for Nevins' books including Emergence of Lincoln, The Ordeal of Democracy, Rockefeller, and History and Historians, with notes by editor Ray A. Billington; miscellaneous transcripts, clippings, newspapers, and photographs. Also, autograph letters and manuscripts by presidents, Civil War figures, financiers, politicians, and authors. There are also the Brand Whitlock World War I Diaries and letters to him by such people as Herbert Hoover, Gen. John J. Pershing, and others.

Correspondence, manuscripts, diaries, commonplace books, drawings, photographs, and printed materials. The collection is a comprehensive documentation of the dramatist's career and includes manuscripts, typescripts, notes, and costume and scenic design for more than seventy of his plays and related writings; 31 diaries, commonplace books, and scrapbooks containing manuscript and typescript notes, travel sketches, original drawings, and photographs; and correspondence files including letters from Harley Granville-Barker, Sir Herbert Beerbohm-Tree, John Galsworthy, Booth Tarkington, and Thornton Wilder. Austin Strong's mother, Isobel Field, was the step-daughter of Robert Louis Stevenson. Consequently, the collection contains much Stevensoniana, including photographs and Isobel Field's letters from Western Samoa, where she was known as "Teuila." Also, correspondence and photographs relating to Cornwall Park, Auckland, New Zealand, which was designed by Austin Strong.

Dawn Powell (1896-1965) was an American author of novels, plays, and short stories. The collection includes address books, appointment books, books, clippings, correspondence, diaries, ephemera, family materials, manuscripts, notes, notebooks, photographs, programs, research files, reviews, scrapbooks, sketches and drawings.

Personal and professional papers of Stedman, including correspondence, letter books, diaries, poetry manuscripts, scrapbooks, photographs, and genealogical materials for the Stedman and Dodge families. Correspondence and manuscripts of his mother, Elizabeth Clementine Dodge Stedman Kinney (1810-1889), poet and diarist, and of his granddaughter, Laura Stedman Gould (1881-1941), author and editor. Also, editions of Stedman's LIBRARY OF AMERICAN LITERATURE including printed materials relating to the marketing; and an album of Civil War photographs by Mathew Brady, inscribed by the photographer to Laura H.W. Stedman as well as additional loose photographs by Brady.

Personal and professional correspondence, publications, poetry manuscripts and diaries, and scrapbooks belonging to Prudential Insurance Company statistician, cancer researcher, and eugenicist Frederick Ludwig Hoffman (1865-1946). These items document Hoffman's career, family life, and his extensive travels.

Correspondence, manuscripts, typescripts, research files, documents, printed materials, photographs, and memorabilia of Mr and Mrs Hough. Correspondence includes both personal and business letters, dealing with wildlife conservation, civic interests, and birding. There is some correspondence of George A. Hough, Sr., father of H.B. Hough, who was editor of the New Bedford MA Standard. Most of the correspondence is arranged alphabetically, by personal name or subject, out-going and in-coming filed together. Henry and Elizabeth Hough's correspondence, for which there are no in-coming or related letters, are filed chronologically. Cataloged correspondents include Calvin Coolidge, Max Eastman, Helen Keller, John F. Kennedy, Emily Post, and James Reston.

The correspondence, research, and teaching files of French-American cultural historian and Columbia University professor emeritus Jacques Barzun (1907-2012).

Papers of Stillman include over 100 items pertaining to the business enterprises of his father, Charles Stillman of Brownsville, Texas, who was engaged in shipping and trade, real estate, and railroad investment. A large portion of the collection documents of James Stillman's activities in banking, in railroad financing, and in other of his business and industrial interests. The letters, legal documents, and miscellaneous papers are representative of the entire span of his career. Included in the correspondence are letters from many prominent financiers and industrialists of his day, including many from William Rockefeller; letters from President Grover Cleveland, some personal in nature and some concerned with business transactions; nine letter books of James Stillman, covering the years 1886-1897, 1906-1918; letter books of his secretary Miss K. Bredin, 1908-1916; journals for the years 1889, 1891, 1898, 1899; bank book recording Stillman's drafts, 1911-1914, on the London firm of Baring Brothers; four diaries, 1881-1884; six notebooks; one cash and journal and one ledger, 1868-1871.

Correspondence relating to Erskine's various educational, musical and literary interests; manuscripts of his writings; lecture notes for college courses; souvenirs of his army service in World War I and his Columbia University professorship, and student papers from his own school and college days. Also, biographical file, scrapbooks, and articles.

Correspondence, manuscripts, documents, memorabilia and printed materials. The correspondence deals with literary and political topics, from such people as Hayden Carruth, Irwin Edman, Lola Ridge and Norman Thomas; numerous manuscripts of Mrs. Marshall's writings, including the notes, drafts, manuscripts and proofs of her last novel THE HILL IS LEVEL and various manuscripts of the stories published in THE CONFRONTATION AND OTHER STORIES, and numerous manuscripts of poetry and short stories. Also included is material on the World War II draft of 19-year-olds, economic aid for Western Europe, the Vietnam War, the origin of SANE, the Committee for Nuclear Responsibility, the Amchitka Islands nuclear tests, the Task Force against Nuclear Pollution, and personal correspondence from her own and her husband's families