The papers of John Ross Delafield (Class of 1896) comprise the largest segment of the collection. His correspondence and other records reflect his avid interest in genealogy of the Delafield family and local history, his views on the cancellation of Allied war debts from World War I, and his advocacy of military preparedness. General Delafield served as president of the Reserve Officers Association from 1923-1926 and of the Military Order of World War from 1930-1933. His correspondents include family members, military officers, political figures, and members of the upper echelon of New York and Hudson River Valley society. There is also a significant amount of correspondence with his classmate and long-time friend, Robert McElroy, who was a professor at Princeton.

Consists of the papers of family members, including Archibald Alexander Hodge, Mary Blanchard Hodge, and Sarah Bache Hodge, as well as the papers of some non-family members.

The records in this series are of a miscellaneous nature. In addition to a facsimile copy of The Baltimore American of August 20, 1773, the first two folders contain printed materials and memorabilia on various topics, including the Second World War and subsequent peace conferences. Other records in the series are of a personal nature, and include a typescript diary by Frisk Matthews when she visited her husband in Vichy, France, from November 26, 1940 to March 2, 1942. Matthews quotes the pages from February 6 to her departure in his memoirs (pp 462-481).

John Witherspoon arrived in America from Scotland in 1768 having been persuaded by the trustees and then medical student Benjamin Rush to assume the presidency of the College of New Jersey. After declining initially, Witherspoon, a graduate of the University of Edinburgh, became one of the most popular and influential presidents in Princeton University's history. Witherspoon served not only Princeton, but also the nascent United States as a member of the Continental Congress. During Witherspoon's tenure the College weathered the turmoil caused by the American Revolution: Nassau Hall sustained heavy damage, enrollment declined, and finances were precarious. In the wake of this conflict, Witherspoon's preaching tours increased enrollment, particularly from the southern United States, and he broadened the curriculum by his emphasis on English grammar and composition. He also obtained needed instruments of instruction such as books for the library and apparatus for scientific study (such as the Rittenhouse Orrery). Witherspoon advocated a well-rounded clergy, emphasizing the liberal education of students, rather than just religious instruction. It was his aspiration to produce men who would not only make exceptional clerics, but also outstanding statesmen. Witherspoon instructed many students who became notable for their contributions to state and federal government, including James Madison, Aaron Burr, Jr., William Smith Livingston, Andrew Kirkpatrick, and Ashbel Green. Part of Witherspoon's popularity and influence with both students and politicians derived from his ability to discuss the merits of contesting views, while using reason to reach an ultimate conclusion.

Consists of lecture notes in notebooks or bound volumes.

Series 36 documents Princeton University's involvement in war. From the Revolutionary War's Battle of Princeton, which was fought in part on campus, to the tremendous efforts made by the University during World War II to facilitate training and mobilization, Princeton has been significantly involved in many of America's most momentous wars. Subjects that relate to the military but not necessarily to a particular war, such as the Bronze Memorial Star program, the Reserve Officer Training Corps (ROTC), and the U.S.S. Princeton series of naval vessels are held in this series as well.

This series contains the records of the Princeton University Library's Department of Rare Books and Special Collections. First organized in 1948-49, the Department has oversight of the Library's holdings of rare books, manuscripts, graphic arts, and numismatics, as well as several other special collections such as the University Archives, the Public Policy papers, and the Cotsen Children's Library. The origins of the Department of Rare Books and Special Collections extend nearly to the beginning of the Library, and much of this material predates the official formation of RBSC as a unit. Other records concerning the early Department of Rare Books and Special Collections can be found in Subseries 1D: Julian Parks Boyd. Please see subseries descriptions for further information regarding the individual subseries.

Editorial correspondence (see also Series 24: Requests Accepted for Publication, 1936-1945)

Consists of property documents in Philadelphia, circa 1788, as well as genealogical data for the Kip and Boudinot families, circa 1801. This series also includes articles regarding Elias Boudinot and his contemporaries, written during the years 1894-1916.

This series includes clippings and print materials related to architecture in general, as well as to Candela's own work, that he collected along with his papers as reference materials. After his exile from Spain following the Spanish Civil War, Candela never continued his formal study of architecture. Instead, during his early years in Mexico, he educated himself on the topic of thin-shell construction through independent reading and subscribing to various architectural journals and reviews, some of which he retained and are included in this series.

On a periodic basis, Whig contracted with a historian, often a university professor, to produce a history of the Hall.

This series contians medals, as well as some coins, related to Princeton University. It is divided into athletic medals, many of which are from Track and Field events; medals relating to Princeton clubs; and other kinds of commemorative medals and coins.

Series 1: Student Correspondence and Writings Collection, 1769-2009 consists of materials integrated with the collection prior to 2011.