Consists chiefly of selected letters of J. J. Hayes sent to Emily Hale related to the Irish theater in the first quarter of the twentieth century.

George McLean Harper was a writer and educator in the late nineteenth and early twentieth centuries. The collection consists of papers and manuscripts concerning two of Harper's books William Wordsworth, His Life, Works, and Influence (1916) and Wordsworth's French Daughter (1921). There are also papers relating to Harper's poems, stories, articles and speeches, as well as some correspondence.

The Calvin S. Hathaway Collection consists of correspondence (especially with Florence C. Quinby), photographs, postcards, offprints, slides, and newspaper clippings of American Curator Calvin S. Hathaway (Princeton Class of 1930) relating to his collection on equestrian statues of the world.

Consists primarily of correspondence between American novelist Ernest Hemingway and his friend Milford J. Baker.

Consists primarily of a few writings and field notes of American geologist Harry Hammond Hess (1906-1969).

Consists of correspondence in French between Léon-François Hoffmann and Haitian poet René Depestre, including handwritten letters, faxes, and several other documents. Other additions include photocopies of correspondence between Haitian writer and politician Jacques Roumain and his wife Nicole Hibbert.

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.

Consists of correspondence, documents, and memorabilia of the American banker and Princeton graduate (Class of 1891) Edward Leavitt Howe (1870-1952).

This collection consists of letters to H. Wright Johnson (Princeton Class of 1948) regarding Harley Granville-Barker, the subject of Johnson's senior thesis at Princeton. Included is Johnson's thesis, typescripts and correspondence concerning The Prevalence of Witches and Weekending, and correspondence between Johnson and George Bernard Shaw who worked closely with Granville-Barker in the English theater.

The Philosophy Manuscripts of Walter Kaufmann consists of manuscripts, galleys, and page proofs of many of the writings and translations of the American philosopher, educator, and author Walter Kaufmann (1921-1980).