Consists of selected material by and about Henry De Wolf Smyth, the American physicist and diplomat who figured prominently in the development of atomic energy, the Manhattan Project, and the production of the atomic bomb.

Consists primarily of letters that American novelist Ernest Hemingway sent to his friend General C. T. Lanham during and after World War II, with related photographs.

Helmut Meyer was a German-born American citizen who fought for the United States in World War II and founded the Helmut Meyer Literary Agency in New York City. The collection contains files from the Helmut Meyer Literary Agency, propaganda from both the Allies and the Axis from World War II, manuscripts of Meyer's own work, and correspondence from friends and clients.

The Helen MacInnes Papers contain the original manuscripts of twenty-two published novels, miscellaneous articles and speeches, and a play of renown Scottish novelist Helen MacInnes.

Consists of manuscripts and related material for four works of fiction by American novelist Harvey Smith (Princeton Class of 1917).

Author of the Pulitzer Prize-winning book The American Revolution (1923), Charles H. McIlwaine (Princeton Class of 1894) was a professor of history and government at both Princeton (1905-1910) and Harvard University (1926-1946). His papers include notes, lectures, and other miscellaneous personal papers.

Consists of research material of American educator and historian Harold Ruland relating to his study of Sebastian Munster (1489-1552) and the history of cosmography and early cartography.

Harold R. Medina was a well-known judge and active Princeton alumnus. These records document Judge Harold Medina's role as a trustee of Princeton University, a member of the Graduate Council, and a member of the advisory council for modern languages and literatures.

Consists of Hanna Fantova's collection of Albert Einstein material, as well as some of her own personal papers.

Consists of manuscripts, correspondence, photographs, scrapbooks, and printed matter of Archery Hall of Fame member Robert P. Elmer (Princeton Class of 1899) related to archery.