The L. Ashton Sly Collection of Musical Scores is a 137 volume collection of vocal scores and/or libretti for one hundred twenty-three musical comedies, comic operas, and operettas, including twenty-eight full production promptbooks. These are arranged alphabetically by title and housed in 8 record center cartons.

This collection consists of materials collected by the law firm of McCarter & English of Newark, New Jersey in connection with representation of the Iowa, Sac and Fox, Otoe and Missouria, and Omaha tribes before the United States Indian Claims Commission between 1958 and 1970. The records document the cases; briefs, findings of fact, valuations, reports and orders are included. More significantly, the records include a vast storehouse of evidentiary documentation on the history of these tribes and others, much of it dating to the early nineteenth century.

The collection illustrates the literary and military careers of James Gould Cozzens in manuscripts, notebooks, diaries (1920-1970), war journals (1911-1945), correspondence (general, family, and business), documents, memorabilia, clippings, and photographs.

Consists of personal papers of American astronomer Henry Norris Russell (Princeton Class of 1897), including notes kept by Russell as a student at Princeton (1894-1898), lecture notes when a professor at Princeton, and working notes on scientific and military problems.

The Jimmy Stewart Collection consists of newspaper and magazine clippings about the life and career of American actor, James Stewart (Princeton Class of 1932). Also included in the collection are film stills and other photographs.

Princeton professor of astronomy (1947-1982), chairman of the Dept. of Astrophysical Sciences, and director of the Princeton University Observatory, Lyman Spitzer was also primarily responsible for founding the University's Plasma Physics Laboratory. His papers include design studies, technical plans and programs, various reports, correspondence, notes, and observations relating to his involvement in the development of the study of space astronomy at Princeton.

Consists of selected papers of the Frederick T. Brown family, which originated in Ohio but at various times lived in Indiana, Minnesota, and New Jersey.

Consists of selected letters and manuscripts by or about Edmund Wilson (Princeton Class of 1916), an American literary critic and author.

The Adlai E. Stevenson Papers document the public life of Adlai Stevenson (1900-1965), governor of Illinois, Democratic presidential candidate, and United Nations ambassador. The collection contains correspondence, speeches, writings, campaign materials, subject files, United Nations materials, personal files, photographs, and audiovisual materials, illuminating Stevenson's career in law, politics, and diplomacy, primarily from his first presidential campaign until his death in 1965.

The Paul Frankl Papers consists of correspondence, writings, notebooks, photographs, and printed matter of the Czech art historian, architect, author, and educator Paul Frankl (1878-1962). A native of Prague, Frankl came to the United States in 1938, and shortly afterwards settled in Princeton, New Jersey, where he was associated with the Institute for Advanced Study.