Consists of correspondence and miscellaneous materials related to Walter Kauzmann's work on the Manhattan Project and his career as a professor of chemistry at Princeton University.

Consists of selected material by and about the Irish poet and dramatist William Butler Yeats, including correspondence, a poetry manuscript, photographs, family items, and Cuala Press ephemera.

Consists of selected correspondence, manuscripts, and photographs of the Anglo-American poet W. H. Auden, one of the most acclaimed poets of the 20th century.

Mary Mapes Dodge was an author and editor of St. Nicholas magazine. This collection consists of manuscripts and correspondence concerning St. Nicholas, and correspondence, documents, photographs, and memorabilia relating to the Dodge family.

William Horne and Ernest Hemingway were lifelong friends. Horne met Hemingway while a volunteer ambulance driver for the American Red Cross during World War I. They were stationed in Schio, Italy, and drove together on the same ambulance. After Hemingway's failed engagement to Agnes von Kurowsky, they shared an apartment in Chicago during the fall of 1920. When Hemingway married Hadley Richardson in September 1921, Horne was in the wedding party. When the writer died in 1961, Horne was an honorary pallbearer. Contains eight Horne-Hemingway items: a copy of a photograph of Frances Horne [Bunny] and Hemingway in Wyoming in 1928; an autograph signed letter by Ernest Hemingway (with postcript by wife Pauline) to "Dearest Bunny and Horney" [Frances and William Horne], dated 9 September [1929], 2 pp., with envelope; an autograph signed letter by Hemingway to "Dear 'Orny" [Horne], dated 1 June [1930], 2 pp., with 5 pp. of fishing gear advertisements with holograph annotations, with envelope; a typed letter (copy) (dictated to Pauline by Hemingway) to "Dear Horny," dated 23 November [1930], on hospital X-ray form; a typed letter (copy) (dictated to Pauline by Hemingway) to "Dear Horney," dated 26 December [1930], 1 p.; autograph signed letter by Hemingway to "Dear Horney" [William Horne], dated 25 March [1931], 1 p., with envelope; a color copy of a telegram sent by Mary and Ernest Hemingway to Mr. and Mrs. Peter Dodge Horne on the occasion of their wedding, 17 September 1955; and a compact disc recording of "Memories of Ernest Hemingway by William Dodge Horne, Jr., whose grandson, William C. Horne, taped the conversation during an English class at Loyola Academy in Wilmette, IL on May 8, 1975"; 1 p.; Also included are a copy of Horne's first person article "The Hemingway I Remember," "as told to Virginia Kleitz Moseley," that appeared in November 5, 1979, issue of the Princeton Alumni Weekly, and a short piece (2012) about Horne's gift of a Hemingway trunk to the Hemingway Museum in Oak Park, Illinois.

This collection consists of American historian William M. Armstrong's works and research material on Edwin Lawrence Godkin (1831-1902), a founder and editor of The Nation (1865-1881) and editor of the New York Evening Post (1883-1900). The collection contains typed manuscripts of Armstrong's biography on Godkin along with other writings, as well as photocopies, microfilms, and typescripts of correspondence.

William M. Leary (1934-2006) was an aviation historian who wrote his doctoral thesis on the politician H. Alexander Smith. The collection contains materials that Leary consulted in the process of writing his thesis, along with a manuscript of the thesis.

Consists of letters and drawings of William Yarrell, a nineteenth-century British naturalist, and related printed matter.

Consists primarily of correspondence with authors such as Gordon Lish, James Purdy, Cynthia Ozick, and Paul Bowles, among many others, along with some writings and publisher files of American literary critic and professor of literature Irving Malin (1934-2014).

Consists of personal and professional correspondence between Lucius Hopkins Miller (Princeton Class of 1897), a professor in Princeton's Department of Religion, and Princeton colleagues, including Woodrow Wilson, fellow educators at other institutions, and publishers, such as Henry Holt.