Consists of papers of Hereward Carrington, a British spiritualist and investigator of psychic phenomena, including correspondence with other notable figures in his field, photographs of mediums and psychic phenomena, several manuscripts, and two diaries.

Consists of copies of letters by American author Herman Melville that were used by Willard Thorp in his selection of Melville's writings published as Representative Selections (1938), as well as other material about Melville.

Consists of mostly English correspondence and manuscripts of the Austrian author Hermann Broch.

Harrison Freeman Matthews Sr. (1899-1986) was a U.S. diplomat and career ambassador. This collection consists of correspondence, a draft of his memoirs, photographs, clippings, films and miscellaneous papers. It includes correspondence with Elizabeth Luke Matthews and a diary she kept during a visit to her husband in Vichy, France in 1940-42.

The H. H. Hess Papers consists of professional papers, correspondence, and related materials of the American geologist and educator Harry Hammond Hess (1906-1969).

H. Hubert Wilson was a professor in Princeton University's Department of Politics from 1943-1977. The collection consists primarily of published sources on topics of interest to Wilson, as well as materials originating in Wilson's teaching at Princeton, and drafts of a publication titled "This Isn't Princeton".

The papers of Princeton University professor Harper Hubert Wilson document his interest and work in civil liberties. A self described "conservative, anarchist and socialist," Wilson provoked his students to think critically about the social problems confronting society, and to challenge the prevailing assumptions about American politics.

This collection contains more than 2,300 items, including film, videotapes, compact discs, audio cassette tapes, reel-to-reel tape, and record albums and covers a broad range of topics including classical music, alumni reunions, lectures, and interviews.

The Historical Photograph Collection: Alumni Series consists of formal portraits of Princeton University alumni arranged chronologically by class year.

The Campus Life series contains photographs documenting aspects of life as experienced by students, faculty, and staff at Princeton University.