John Doar (1921-2014) was a lawyer who worked for the Civil Rights Division of the Department of Justice (1960-1967) and was chief counsel to the House Judiciary Committee investigating the Watergate scandal (1973-1974). He also served as president of the New York City Board of Education (1968-1969) and as president of the Bedford-Stuyvesant Development and Services Corporation (1967-1973). The collection primarily documents Doar's tenure with the Civil Rights Division in the form of court records, investigation files, correspondence, and notes, though materials from Doar's time on the Watergate impeachment inquiry committee and on the Board of Education are also present. To a lesser extent, the collection is composed of records from Doar's work for the Bedford-Stuyvesant Corporation and his private law practice.

This collection consists of materials collected by the law firm of McCarter & English of Newark, New Jersey in connection with representation of the Iowa, Sac and Fox, Otoe and Missouria, and Omaha tribes before the United States Indian Claims Commission between 1958 and 1970. The records document the cases; briefs, findings of fact, valuations, reports and orders are included. More significantly, the records include a vast storehouse of evidentiary documentation on the history of these tribes and others, much of it dating to the early nineteenth century.

Arthur Cyrus Warner (1918-2007) was a prominent figure in the gay liberation movement, focusing his efforts on legal reform to protect the civil liberties of the gay community. Warner's papers document his involvement in legal reform and other issues pertaining to gay rights. The papers largely consist of legislative and court documents about cases affecting gay civil liberties, and related memoranda, correspondence, and writings.

Marten Van Heuven (1932- ) led a career in the United States foreign service, serving in several European countries, which culminated with his service as National Intelligence Officer for Europe from 1987 to 1991, a position responsible for the analysis of European and Canadian issues. Van Heuven's papers document his career in the United States foreign service and at RAND, and include his speech files, writings files, and correspondence.

Harold Boies Hoskins was a businessman, diplomat, and educator working in Middle Eastern affairs. This collection consists of correspondence, diaries, notes, photographs, publications, maps, and professional files that document Hoskins' personal and professional activities, as well as the Hoskins family.

Tristan E. Beplat (1912-1997) was a New York banking executive with expertise in international banking. He had a significant role in the economic reconstruction of postwar Japan through his work in the Finance Division of the Economic and Scientific Section, General Headquarters, Supreme Commander for the Allied Powers. Beplat's papers document his service in Japan and include memoranda, papers, and reports on the banks and economy of Japan from 1945 to 1948.

The Woodrow Wilson Additional Materials consist of materials that the Seeley G. Mudd Manuscript Library has acquired on Woodrow Wilson since the mid-1990s.

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. Subgroup 2, Series 2, 3, and 4 have been digitized and are available for members of the Princeton community to view here. To view the database from outside Princeton University, please see the Guide to the American Civil Liberties Union Records.

Jeffrey Fuller (1917-1970) worked for the American Civil Liberties Union (ACLU) from 1948 to 1966 and also served in the U.S. Army during World War II. Fuller's papers document his service in the U.S. military and his work for the ACLU and include his personal and professional correspondence, memoranda, and diaries.

Lyman B. Kirkpatrick, Jr. served with the Central Intelligence Agency (CIA) from its inception in 1947 until 1965. The papers document Kirkpatrick's career at the CIA, including his role as inspector general during the Bay of Pigs invasion, as well as his service in the U.S. Army and Office of Strategic Services during World War II, and his time as a professor of political science at Brown University.