Alan Windsor Richards was a freelance photographer known for the images he captured of people and events associated with Princeton University from the mid-1940s through the late 1960s. The collection consists of photographic negatives and a very few photographic prints of images captured by Richards of Princeton University athletes and sports events.

Consists of a photocopied duplicate archive of the original Albert Einstein Archive at Hebrew University in Jerusalem, divided into scientific and non-scientific sections, including published and unpublished manuscripts, articles, lectures, notebooks, notes, travel diaries (1925-1933), family papers, and correspondence.

Albert Mathias Friend, Jr. (Princeton Class of 1915), was an officer and a scholar. Friend served in World War I and then did his graduate studies in art and architecture in Europe, studying and salvaging the great works of art and architecture that may have been damaged by the fighting. He then worked with Harvard's Dumbarton Oaks Research Library before becoming a professor at Princeton University. The collection contains notes and course materials from Friend's time as a student and as a professor, correspondence, and some of his research materials, photographs, and negatives, focusing on medieval art and architecture in Greece, Rome, and other Mediterranean cultures.

Albert O. Hirschman (1915- ) was a leading scholar in the field of economic development whose work focused on Latin America but encompassed the globe. He was a professor at Yale, Columbia, Harvard, and the Institute for Advanced Study in Princeton, New Jersey. Hirschman's papers document his scholarship on economic development and his academic career and include his correspondence written while he was at the Institute for Advanced Study, his writings, and his research notes and materials, especially related to his work in Latin America and for the World Bank.

The collection contains both original and printed material relating to Albert Schweitzer, the French missionary physician who founded the Lambaréné Hospital in French Equatorial Africa in 1913 and who won the Nobel Peace Prize in 1953 for his philosophy of "reverence for life."

The Alejandro Rossi Papers consist of personal notebooks, manuscripts, correspondence with writers, academics, editors and artists, and printed material of the writer.

Alexander D. Wainwright (Princeton Class of 1939) was an avid bookman and collector. He had a lengthy career at the Princeton University Library, serving as assistant university librarian for collection development and as curator of the Morris L. Parrish Collection of Victorian Novelists. His collection consists of of manuscripts, correspondence, drawings, and related material by and about Thomas Wolfe, the American novelist, playwright, and storywriter.

Alexander Leitch was a member of the Princeton Class of 1924 and an administrator at Princeton University for the entirety of his professional career, most notably holding the Office of the Secretary from 1933 to 1963. Consists of 55 oversized scrapbooks assembled by Alexander Leitch '24 during his career as a Princeton University administrator.

Consists of the collection of Alexandros Xydēs, Greek diplomat and art critic. Included are typed manuscripts, correspondence, off-prints, ephemera, and other printed material with a focus on Greek politics, Cyprus, human rights, and international relations.

Consists of personal, professional, and academic papers of the Pueblo anthropologist Alfonso Ortiz (1939-1997), including correspondence, working files, and materials related to the Association on American Indian Affairs (AAIA).