Louis O. Coxe (Princeton Class of 1940) was a noted twentieth-century poet, playwright, and critic. The collection contains autograph and typescript versions of Coxe's poetry and sixteen of Coxe's notebooks. Also included are materials for the play Billy Budd, such as notes, drafts, worksheets, galley proofs, and production notes.

Consists of works, some accompanying correspondence, and photographs of poet, essayist, and church historian, Hubertis M.Cummings (Princeton Class of 1907).

Consists of selected correspondence, poetry, photographs, and printed material of and relating to 20th-century American poet Robert Frost.

Consists mainly of correspondence between family members of Arthur L. Frothingham, who was a Princeton professor of archaeology (1886-1905). The collection includes correspondence and family photographs from his father, Arthur L. Frothingham, mother, Jessie Peabody Frothingham, and sister, Jessie Peabody Frothingham. Also present are manuscripts concerning Arthur L. Frothingham's study (ca.1912) on arches in the Roman Empire.

Consists primarily of family correspondence of John Henry Hobart, a bishop of the Protestant Episcopal Church.

Consists primarily of material relating to Ohio farmer Luzern Humphrey's overland journey from Kanesville, Iowa, to the Oregon Territory in 1852, his life there through 1853, and his return to Iowa in 1854, including his journal and 51 letters to his wife in Ohio. Also included are some papers relating to the family of William Miller, the founder of Adventism.

Consists chiefly of letters of the Constitution signer and Philadelphia lawyer Jared Ingersoll to his son Charles while he was a student at the College of New Jersey (now Princeton University).

Consists of correspondence, manuscripts, and documents of members of the Joline family of Princeton, New Jersey.

Consists chiefly of letters and photographs of Arthur Machen, the Welsh-born writer called "the Apostle of Wonder" because of his mastery of the English language and outstanding creation of supernatural fiction.

Consists of works, correspondence, documents, photographs, memorabilia, family papers, scrapbooks, and an autograph book (1880) of Charles Grosvenor Osgood, reflecting his role as one of Woodrow Wilson's original preceptors (1905) and the importance of the preceptorial system at Princeton. The collection contains typed manuscripts of Osgood's lectures on Milton, Spenser, and Samuel Johnson, addresses and note cards, and professional correspondence.

Consists of the personal papers of Ernest Cushing Richardson, librarian of Princeton University Library from 1890 till 1925.

Consists of original letters and transcriptions of additional letters by Edwin Arlington Robinson, American poet and winner of three Pulitzer Prizes.

The Auguste Rodin Collection contains over fifty Rodin letters, cards, telegrams, and notes, of which about half are in the hand of the sculptor.

Consists of works, correspondence, diaries, photographs, scrapbooks, and printed matter of J. Duncan Spaeth, a preceptor (1905-1911) and professor of English (1911-1935) at Princeton.

Consists of selected papers of W. Oliver Strunk, who was a professor of music at Princeton University (1937-1966).

Consists of selected manuscripts, correspondence, and documents of the twentieth-century British biographer and bibliophile A. J. A. Symons.

Consists of selected correspondence and drafts and/or corrected typescripts of short stories, articles, and five novels of American novelist Benedict Thielen.

Consists of selected letters and a manuscript of John Von Neumann, one of the 20th century's preeminent mathematicians, and an early pioneer in fields such as game theory, nuclear deterrence, and modern computing.

Consists chiefly of correspondence of Andrew Fleming West, who served as dean of Graduate Studies at Princeton University when Woodrow Wilson served as the University's president.

Consists of selected correspondence and student account books of Lawrence Crane Woods, a member of the Princeton Class of 1891 and vice president and assistant manager for the Equitable Life Assurance Society.