The Selected Papers of Harper & Brothers consist primarily of the editorial and business correspondence of Harper & Brothers, a distinguished publishing firm, between 1909 and 1960.

This collection consists of correspondence of the New York City literary agency Harold Ober Associates, Inc. and its three London affiliates. Established by Harold Ober (1881-1959) in the 1920s, the agency quickly grew in size and reputation, and has been considered one of the leading representatives for American and British writers in the world. The correspondence includes letters between the agency or affiliates and clients, editors, publishers, and other agents. Also included are other organizational files, such as date books and financial ledgers.

Consists of selected papers of Desmond Harmsworth (1903-1990) and other members of the Harmsworth Family, including manuscripts, correspondence, and legal and business documents between Desmond Harmsworth Limited and The Nonesuch Press.

John Marshall Harlan (1899-1971), a distinguished lawyer and jurist, served on the U.S. 2nd Circuit Court of Appeals and the U.S. Supreme Court. Harlan's papers consist of legal materials, correspondence, writings, and personal papers that document his career as an attorney and a judge, especially the period when he was a Supreme Court Justice.

James Penrose Harland was a graduate of the Princeton University Class of 1913. The collection consists of James Penrose Harland's diaries, as well as clippings, photographs, postcards, and some correspondence.

The Collection on William F. McCombs contains materials on and by William F. McCombs, a lawyer who was actively involved in Woodrow Wilson's gubernatorial and presidential campaigns. McCombs' secretary, Maurice F. Lyons, provided transcripts of correspondence and notes authored by McCombs to Arthur S. Link, as part of Link's work on The Papers of Woodrow Wilson. Correspondence between Lyons and Link concerning the typescripts is also located in this collection, as well as a set of bound newspaper clippings on Wilson's campaigns and administrations created by McComb's sister.

Consists of poetry manuscripts, documents, pictorial works, correspondence, and miscellanea relating to the English poet William Cowper (1731-1800), and to his circle of family, friends, and editors, collected by Neilson Campbell Hannay.

Consists of selected letters to American scholar and educator James Holly Hanford, most of them concerning his studies of John Milton.

Consists of a manuscript and correspondence of Sinclair Hamilton (Princeton Class of 1906).

Consists of papers of British poet and literary critic Ian Hamilton that were used in preparation of his biography J. D. Salinger: A Writing Life, which was never published as a result of judicial decisions in the case of J. D. Salinger vs. Random House and Ian Hamilton (1987).

Melvin A. Hall's renaissance career as adventurer, aviator, soldier, agent, financial administrator and author spanned four and a half decades, and is well represented in this collection. The materials include: diaries; personal and business correspondence; official documents, reports and correspondence from his tenure with the American Financial Mission in Persia; copies of his published writings, including drafts of his books Journey to the End of an Era and Bird of Time; articles, reviews, speeches and military intelligence reports; copies of unpublished writings; subject files containing background and research notes; information on his medals, awards and commendations; diaries and correspondence from Hall's father, William Augustus Hall, Hall's wife Josephine Johnson Hall, a World War I field nurse; and photographs and scrapbooks.

Consists (primarily) of manuscripts of works by Handel and his contemporaries but also of correspondence and subject files gathered by James S. Hall, the English surgeon who collected most of the manuscripts.

Consists of four small groups of correspondence between Wesley Halliburton and others after the death of his famous son Richard in 1939. Richard Halliburton was a celebrated adventurer and author known, among other things, for having swum the length of the Panama Canal.

Richard Halliburton traveled extensively in the first part of twentieth century after graduating from Princeton University in 1921. The collection contains autograph and typescript drafts of seven of Halliburton's books, short stories, essays, school notes, and other travel memorabilia, as well as Halliburton's correspondence with his parents and others, research materials about Rupert Brooke, and a significant group of photographs documenting his travels throughout Europe, Africa, Asia, and the Middle East.

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.

Consists of letters and other materials of the Venezuelan-born French composer Reynaldo Hahn.

George Hafstad was a plant pathologist and a field technician with the U.S. Rubber Development Corporation in Brazil from 1943 to 1945. The George E. Hafstad Papers include a diary, several technician reports, and a folder of photographs from Hafstad's time as a field technician with the U.S. Rubber Development Corporation Amazon Division.

Consists of photographs (ca. 1944-1946) of Greece and Greek partisans taken by classical scholar Moses Hadas.

Consists of selected manuscripts and documents of Sparse Grey Hackle, an American author of books about angling.

Peter Grose is an editor and specialist on the history of intelligence. The Peter Grose Papers document Grose's research on Allen Dulles, the origins and early years of the Central Intelligence Agency, and the Soviet Union.