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.

Personal and professional papers including correspondence, manuscripts, documents, diaries, journals, photographs, and printed materials relating to his teaching at various universities, his literary studies and writings, and his professional activities in such organizations as the Moder Language Association and P.E.N. His correspondents include contemporary authors such as Edmund Blunden, Christopher Hassall, Louis Kronenberger; scholars such as James P. Clifford, Leon Edel, and A.L. Rowse. There are also some letters collected by Halsband, including those by Mrs Piozzi, John Wilkes (1727-1797) and John Stuart, 3rd Earl of Bute (1713-1792). Among the manuscripts are notes, drafts, typescripts, and proofs of his LIFE OF LADY WORTLEY MONTAGU (Oxford, 1956) and COMPLETE LETTERS OF LADY MARY WORTLEY MONTAGU (Oxford, 1965-1967). Also, manuscripts and typescripts of Halsband's diaries, journals, lectures, articles, book reviews, and essays. The printed materials include ephemera, books, and offprints by Halsband and books by other authors inscribed to him. There is a watercolor portrait of Halsband by Stephen Andrews, London, ca. 1966.

Correspondence, manuscripts, playscripts, screenplays, diaries, documents, contracts, financial records, photographs, phonograph records, motion pictures, playbills, posters, sheet music, cartoons, art work, memorabilia, scrapbooks, and printed materials. . The collection consists chiefly of correspondence and production files relating to the creation, production, and performance of their works for stage, screen, radio, and television, such as Leave It To Me and Kiss Me Kate (with music by Cole Porter), Boy Meets Girl, and My Three Angels. Correspondence (with twentieth century authors, playwrights, musicians, political figures, and actors) includes: George Abbott, Jean Arthur, Bennett Cerf, Katharine Cornell, Jo Davidson, George and Ira Gershwin, Alec Guinness, W. Averell Harriman, Lilli Lehmann, Mary Martin, Laurence Olivier, Mary Pickford, Cole Porter, Regina Resnick, Eleanor Roosevelt, Robert E. Sherwood, Lincoln Steffens, Kurt Weill, Rebecca West, and Thornton Wilder. There is also correspondence concerning Bella Spewack's work with the New York Girls' Scholarship, UNRA, and the Sports Center of Israel. In addition to the production files, there are manuscripts and typescript drafts for novels, short stories, and articles by the Spewacks.

Correspondence, manuscripts, notes, memoranda, notebooks, notecards, proofs, photographs, microfilms, and printed materials. The Papers include the manuscript research materials and correspondence for each of his books except his biography of Theodore Dreiser. Among the correspondents are William Benton, Bruce Catton, Carey McWilliams, Mrs. Fremont Older (Cora Miranda Baggerly Older), and Thornton Wilder.