The Delafields were avid collectors of family history and family-related memorabilia in the Hudson River Valley region of New York state. This collection consists of the papers of the Delafield family and related families, most prominently the Livingstons, containing both personal papers and papers collected for their genealogical and historical significance.

Consists of extensive manuscripts, documents, and correspondence of American poet and literary critic Allen Tate, one of the leading members of the Fugitive and Southern Agrarian literary movements.

The Louis Fischer Papers include correspondence, interviews, articles and notes, lectures and speeches, photographs, and audiovisual materials that document his life as a journalist, writer, and commentator on international affairs. They also include the papers of his wife, Bertha Markoosha Fischer, an author in her own right, as well as family correspondence and papers. In the latter part of his life Fischer was affiliated with of the Institute for Advanced Study (1959-1961) and Princeton University's Woodrow Wilson School of Public and International Affairs (1961-1969).

This collection contains correspondence, speeches, lecture notes, writings, and photographs of Edward S. Corwin, a noted constitutional scholar who taught at Princeton University for much of his academic career. Nationally-known and widely published, Corwin consulted with many other academics as well as politicians involved with constitutional issues, most notably when he publicly supported Franklin D. Roosevelt's Supreme Court reorganization ("court packing") plan.

Raymond Blaine Fosdick (1883-1972) served as Under Secretary General for the League of Nations (1919-1920) and as President of the Rockefeller Foundation (1936-1948). The bulk of the collection consists of correspondence related to military life during World War I, the formation and activities of the League of Nations, and the administration of the Rockefeller Foundation in the 1920s through 1940s. The collection also contains various writings and personal memorabilia.

Consists of a photocopied duplicate archive of the original Albert Einstein Archive at Hebrew University in Jerusalem, divided into scientific and non-scientific sections, including published and unpublished manuscripts, articles, lectures, notebooks, notes, travel diaries (1925-1933), family papers, and correspondence.

The American Civil Liberties Union Records document the activities of the Union in protecting individual rights from 1920 through 1995. The files contain materials on freedom of speech, expression, and association; due process of law; equality before the law; legal case files; and organizational records. Within these categories files reflect subject areas such as academic freedom, censorship, racial discrimination, aliens' rights, privacy concerns, labor concerns, amnesty, and government loyalty and security. The files reflect work on litigation, advocacy and public policy, and subject files on various areas of interest connected with civil liberties. Materials include correspondence, court documents, memoranda, printed matter, minutes, reports, briefs, and legal files. Also included are materials from ACLU affiliate organizations, and the Lawyers Constitutional Defense Committee.

The Records of United Service to China, Inc., known from 1941 to 1946 as United China Relief, Inc., document the activities of the organization from the early formation in 1940 to its official consolidation with the American Bureau for Medical Aid to China in 1966. In addition there is a limited amount of material from other Chinese relief agencies that predate the founding of United China Relief / United Service to China. The Records focus on UCR/USC attempts to raise money in the United States, to educate Americans about China and the Chinese people, and to carry on relief work in China. The collection consists primarily of correspondence among the various individuals and agencies involved with UCR/USC, along with other material produced by the agency, such as minutes and publicity material. In addition, the collection includes a series of photographs dealing with China during the 1940s and efforts in the United States to raise money for China during the same period.

The Historical Subject Files Collection documents Princeton University history and related topics from 1746 to the present. The collection consists of documents in almost every two-dimensional format: articles, books and booklets, clippings, correspondence, memoranda, non-photographic images, notes, pamphlets, posters, and reports.

The Karl L. Rankin Papers consist of correspondence, writings, memoranda, diaries, scrapbooks, and photo albums kept by Mr. Rankin which span his lifetime and career as an ambassador.