Papers of the Irish-American poet, editor of Dun's Review, and lecturer. Collection includes correspondence, business and literary essays, radio scripts, plays, poems, journals, and speeches. Correspondents include Padraic Colum, Robert Hillyer, Seumas O'Brien, Shaemas O'Sheel, and other literary figures.

Papers of the American author, lecturer, novelist, and literary critic. Correspondence, 1929-80, with Harriette Arnow, Newton Arvin, Van Wyck Brooks, Baker Bromell, Malcolm Cowley, Robert Cantwell, Robert Gorham Davis, Henry Christman, George Cole, James T. Farrell, Joseph Freeman, Herbert Gold, Corliss Lamont, Lucy Robbins Lang, John Lydenburg, Georgia McKinley, Fulmer Mood, Walter Ripton Morris, Wright Morris, Richard Rovere, Evelyn Scott, Lincoln Steffins, and Ella Winter, among others. Also correspondence and editorial reader's reports for Macmillan Publishing Company. Writings include articles, book manuscripts, a journal (1942-1973), lectures, as well as research notes, correspondence, and memorabilia relating to the production of Hicks' biography of John Reed. Large collection of printed material includes book reviews, clippings, and an assortment of Leftist pamphlets and periodicals from the 1930s.

Papers of the American poet, literary critic, scholar. Correspondence which is of greatest depth and duration includes letters from William Rose Benet, Winifred Bryher, Eleanor Clark, Malcolm Cowley, E.E. Cummings, Hilda Doolittle, Richard Eberhart, James Farrell, Dudley Fitts, John Gould Fletcher, Joseph Freeman, Robert Hillyer, Raymond E. F. Larsson, Norman Holmes Pearson,James Putnam, Muriel Rukeyser, Evelyn Scott, Winfield Townley Scott, John Sweeney, Allen Tate, M.B. Thornton, Louis Untermeyer, T.C. Wilson, and Morton Zabel.

Correspondence, manuscripts, legal and financial material of the Irish-American writer.

Papers of the American author, poet, educator. General, literary, and family correspondence; writings (essays, poems, poetry, reviews, speeches, manuscripts, galley proofs); memorabilia (photographs, clippings, genealogies, daguerreotypes. family Bibles, miniatures, hymnals). Notable correspondents include William Rose Benét, Millicent Todd Bingham, Ben Lucien Burman, Frederick Chamberlin, James Gould Cozzens, Max Eastman, Kimball Flaccus, Horace Gregory, Ralph Hodgson, Robert Huff, Amy Lowell, Archibald MacLeish, Marianne Moore, James B. Munn, Robert Nathan, John Neihardt, Louise Townsend Nicholl, Bliss Perry, Lizette Reese, Lennox Robinson, Paul Rosenfeld, Mark Schorer, Walter Magnes Teller, Mark Van Doren, and Edward Weeks.

Papers of the African-American poet, author, critic. Correspondence, and manuscripts by Braithwaite and others. Notable correspondents include Arna Bontemps, Louis Bromfield, Sterling Brown, Marie Bullock, Witter Bynner, Cass Canfield, Bliss Carman, Bennet Cerf, Katherine Chapin, James Cozzens, Countee Cullen, Gustav Davidson, W.E.B. DuBois, Kimball Flaccus, Robert Frost, Claire and Nina Gerbaulet, Louis Ginsberg, Hermann Hagedorn, Leigh Hanes, Robert Hillyer, John Holmes, Langston Hughes, Georgia Johnson, MacKinlay Kantor, Joseph Joel Keith, Florence Lennon, Benjamin Mays, David McCord, Marianne Moore, Maurice Peloubet, Bliss Perry, Minerva Perry, Helen Channing Pollock, Ruby Altizer Roberts, Paul Robeson, Angelo Schmuller, Lulu Schultz, George S. Schuyler, Delmore Schwartz, Eli Siegel, Jules Siegel, Noble Sissle, Chard Powers Smith, Vladimir Sokoloff, Arthur Spingarn, Jesse Stuart, A.M. Sullivan, May Swenson, Ridgely Torrence, Carl Van Vechten, George Sylvester Viereck, Harold Vinal, Booker T. Washington, Robert C. Weaver, John Hall Wheelock, Margaret Widdemer, William Carlos Williams, and Roscoe Wright.