Consists of documents and correspondence of Smith Thompson (Princeton Class of 1788) covering, for the most part, the years (1823-1843) when he served on the U.S. Supreme Court.

Consists of selected manuscripts and documents of Sparse Grey Hackle, an American author of books about angling.

Consists of selected papers of civil engineer William B. Bamford, a member of the Princeton University Class of 1900.

Consists primarily of correspondence between childhood friends William B. Smith and Ernest Hemingway, the American author and Nobel Prize winner.

Consists, for the most part, of letters to American poet William Meredith (Princeton Class of 1940) from American authors, most of whom have been associated with Princeton.

Consists of selected papers of award-winning American novelist and photographer Wright Morris, including many letters written to his friend and fellow Western writer Robert J. Horton.

The Selected Papers of Harper & Brothers consist primarily of the editorial and business correspondence of Harper & Brothers, a distinguished publishing firm, between 1909 and 1960.

Since its introduction in the mid-1920s the senior thesis has been a core element of the undergraduate curriculum at Princeton University. The collection contains the senior theses of Princeton undergraduates.

Sergio Ramírez has been a leading Nicaraguan author and politician. In 1977 Ramírez became head of the "Group of Twelve", a group of prominent intellectuals who supported the struggle of the Frente Sandinista de Liberación Nacional (FSLN) against the dictatorship of Anastasio Somoza Debayle. With the triumph of the Revolution in 1979, he became part of the Junta of the Government of National Reconstruction and in 1984 he was elected vice-president under Daniel Ortega. The collection consists of manuscripts of his writings, source materials, personal, literary and political correspondence, papers and documents related to Ramírez's political career and to Nicaraguan political history, writings of others, photographs, and graphic and printed materials.

The collection consists of materials relating to the three-day Sesquicentennial Celebration in October 1896, at which the College of New Jersey became Princeton University. In addition to ephemera and printed material distributed at the celebration, the collection includes a typescript draft of President Francis Landey Patton's sermon, sesquicentennial memorial books, a published sketchbook, official congratulations from other institutions, and press releases and newspaper clippings reporting the events.

Shirley Ecker Boskey was an attorney who served as director of the International Relations Department of the World Bank. The Shirley Ecker Boskey Papers consist of reports, correspondence, meeting minutes, and publications from Boskey's time at the Department of the Interior and at the World Bank.

Swydan was a Syrian journalist who emigrated to the United States in 1909. He served as secretary of the Russian Imperial Orthodox Society and the United Syrian Christian Association of North America, and founded a business, S. Swydan and Sons, Russian traders, in Worchester, Mass. The collection consists of papers of Swydan, including correspondence (personal and business, some in Russian), family photographs and negatives, framed documents (including several embroidered floral and Arabic pieces), writings, maps, and newspaper clippings.

This collection consists of over 400 letters from French writer, philosopher, and feminist theorist Simone de Beauvoir to her mother, Françoise de Beauvoir, and sister, Hélène de Beauvoir (also referred to as Henriette), dating from October 1918 to December 1968.

Consists of a manuscript and correspondence of Sinclair Hamilton (Princeton Class of 1906).

The collection represents the entire extant archive of Sir Frank Kermode, a distinguished British literary critic, and includes writings (reviews, essays, lectures, radio broadcasts), correspondence, photographs, and printed material, as well as material relating to public controversy about the funding for Encounter, which Kermode co-edited.

Consists primarily of letters (approximately 500) from contemporaries of English editor and publisher Sir Israel Gollancz.

Sonja Karsen, born in 1919, was a professor of Spanish at Skidmore College and intensively researched Jaime Torres Bodet and Guillermo Valencia, two Latin American politicians and poets. The Sonja Karsen papers contain much of her research on these two figures.

Sonya Rudikoff (1927-1997) was a writer, literary critic, and independent scholar, active from the 1950s through the 1990s, who wrote primarily on Victorian literature, feminism, and Virginia Woolf. The papers include Rudikoff's professional and personal correspondence, including five decades of extensive correspondence from second-generation Abstract Expressionist painter Helen Frankenthaler; typescripts of Rudikoff's unpublished fiction and lectures; notebooks, papers, and diaries from her time at Bennington College in the late 1940s; along with a curriculum vitae and bibliography of her work and some related materials.

Consists of Spanish legal and military documents relating to the administration of Cuba in the 19th century.