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; miscellaneous letters, manuscripts, clippings, and printed material, 1867-1922, relating to the American Historical Association, the Centenary of Anglo-American Peace, and Dartmouth College; memorabilia, and photographs and postcards. Also, Dunning family correspondence and manuscripts, 1781-1915, including letters from Robert Kerr to W.A. Dunning; letters and post cards to Matilda A. Dunning; journals and diaries of William A. Dunning, 1873-1875 and undated, and Charlotte Dunning, 1899-1915; miscellaneous letters among family members; visiting cards; a composition written by Dunning while a boy; and letters relating to Dartmouth college. The collection also includes manuscript notes for lectures, articles, reviews, books, and chapters by Dunning. Some subjects include: "The British Empire and the United States", "Carl Schurz", "England and Ireland", and "Political Theory".