Consists of 113 photographs of American dramatist Eugene O'Neill and his wife, Carlotta, taken by American writer and photographer Carl Van Vechten.

The Laurence Hutton Photograph Albums consists of several hundred photographs and numerous portraits of prominent 19th-century artists and literary, political, and historical figures, compiled by editor and essayist Laurence Hutton.

David Lawrence, Princeton Class of 1910, was an American magazine and news service founder, editor, columnist, and author. This collection contains papers of Lawrence, including correspondence with notable twentieth century figures, articles, speeches, correspondent dispatches, radio broadcast transcripts, and manuscripts for several books.

The Papers of Woodrow Wilson Project, co-sponsored by the Woodrow Wilson Foundation and Princeton University, was a successful project to publish material generated by and influencing Woodrow Wilson; the 35 year project resulted in an acclaimed 69 volume set. The records of the Papers of Woodrow Wilson Project, compiled by chief editor Arthur S. Link and his staff, document the life and times of the former Princeton University president, governor of New Jersey, and president of the United States, Woodrow Wilson, as well as the project to bring together documentation by and about Wilson.

The Council on Foreign Relations is a nonprofit, nonpartisan research and national membership organization dedicated to improving understanding of international affairs by promoting a range of ideas and opinions on United States foreign policy. The Council has had a significant impact in the development of twentieth century United States foreign policy. The Records of the Council on Foreign Relations document the history of the organization from its founding in 1921 through the present. The collection includes valuable source documents and records of the meetings, group discussions and studies, and conferences of the Council, as well as portions of its administrative records.

Consists mainly of original manuscripts, photostats, and transcripts of German, French, and Italian Medieval and Renaissance legal documents, including papal bulls, passports, wills, deeds, petitions, wax seals, and manor rolls collected by Chalfant Robinson.

The Project Files series contains the records of twelve of the ACLU's projects, which each addressed an area of civil liberties violations. Project records typically consist of case files, research files, and project publicity and correspondence. The best documented projects are the Children's Rights Project and Women's Rights Project, and to a lesser extent the Arts Censorship Project, Capital Punishment Project, and Reproductive Freedom Project.

Consists of scholar Robert K. Root's manuscript and notes for his annotated edition of Chaucer's Troilus and Criseyde (1926), as well as six diaries he kept between the years 1914 and 1920.

Consists of personal papers of American naval officer Harpur Allen Gosnell (Princeton Class of 1912), including his articles on naval history and naval subjects.

Consists of selected correspondence and documents by and about George Washington, first president of the United States, as well as some items of members of his family.