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.

Papers, letters, memoranda, memorabilia, and manuscript music scores assembled by and related to the life and musical activities of Anton Seidl. The collection includes many letters from Cosima Wagner and her children addressed to Anton Seidl and his wife, the opera singer Auguste Kraus Seidl. There are also letters from Lilli Lehman, Edvard Grieg, Antonin Dvorak, Bronislaw Hubermann, Carl Goldmark, Maud Powell, Marianne Brandt, Felix Weingartner, Lyman Abbott, and many others. The letters are chiefly concerned with musical performances, composition, and related affairs. There are journals, diaries, and memoranda in Seidl's hand, as well as photographs and clippings relating to his conducting career. Also, twenty-seven manuscript scores of Seidl's orchestrations of various works.

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.

Correspondence, manuscripts, photographs, and printed materials of Lamont. Letters from George Santayana (1863-1952), with Lamont and others, a few early manuscripts, interviews and other notes on Santayana, and general correspondence about him. A series of letters from John Dewey to Lamont, discussing his ideas on humanism and religion. Extensive correspondence with the family of John Masefield including approximately 100 letters from Judith Masefield to Lamont, primarily written shortly after the death in 1967 of her father the poet John Masefield, and dealing with his life and work. Also, a few of her own writings; a number of the letters are descriptive of historical England and her concern for contemporary events. Among the letters from other family members are fifteen from Lamont's nephew, Jack Masefield, and 53 from his cousin Sir Peter G. Masefield, 1970-1983, conveying news about Judith as well as interest in the publication of John Masefield's letters from the World War I years and their continuing appreciation of Lamont's work on Masefield. There is discussion on the publication of Masefield's letters to Corliss' mother, Florence Lamont, printed in 1979.

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.

Correspondence, manuscripts, documents, photographs and printed material of the English poet and critic, Edmund Blunden, documenting his personal and professional activity. Blunden's letters to his second wife, Sylva Norman, and his secretary, Aki Hayashi, are particularly well represented. Also included are many letters addressed to Blunden by eminent literary figures such as John Betjeman, George Orwell, Siegfried Sassoon, Stephen Spender, and Henry Williamson. Other literary correspondents are Adrian Bell, Joyce Cary, Richard Church, C. Day Lewis, Walter de la Mare, Graham Greene, H.D., William Plomer, Kathleen Raine, and Leonard Woolf. A substantial portion of the cataloged correspondence contains drawings, verse fragments and poems by Blunden which have been analyzed. Also present are eleven of Blunden's diaries, 1936-1967, which contain drafts of a number of poems. In addition, the collection contains a small number of autograph manuscripts of Edmund Blunden's literary works.

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.

This collection consists of copies of correspondence, articles, diaries, memoirs, and other manuscripts by and about the Blackwell family. Also, a small group of papers, including correspondence, documents, photographs, and printed papers, about the Rice family of New York.

Personal correspondence, speeches, subject files, photographs, and printed and miscellaneous material of Hogan. The correspondence, speeches, and other material relate primarily to his activities as District Attorney, and to his unsuccessful campaign for the U.S. Senate, 1958. The papers also reflect Hogan's deep concern for Columbia University, as a Trustee and a member of numerous alumni committees. Among the major correspondents are Harry J. Carman, Dwight David Eisenhower, Robert F. Kennedy, Arthur Hays Sulzburger, and Herbert Bayard Swope.

Manuscripts of essays and course notes taken while a student at Amherst College, 1884-1889, and at Berlin University, 1892-1894. Articles, addresses, essays, lectures, lecture notes and reading notes. Also included are diaries for the years 1936-1940 and correspondence concerning Amherst College, Columbia University, and Woodbridge's stay as a visiting scholar in Berlin, 1931-1932. Among his correspondents are: Frederick S. Allis, Secretary of the Amherst Board of Trustees; Stanley King, President of Amherst; and Nicholas Murray Butler, President of Columbia. Some photographs are also included.