Consists of an open collection of manuscript material related to print collections of Leonard L. Milberg (Princeton Class of 1953): Leonard L. Milberg Collection of American Poetry, Leonard L. Milberg Irish Theater Collection, and the Leonard L. Milberg Collection of Jewish-American Writers.

Consists of select correspondence, dating from 1946 to 2011, of art historian Charles W. Millard (1932-2017) with artists such as Sir Anthony Caro, Helen Frankenthaler, Carl Chiarenza, Mark Hewitt, Nick George, Jules Olitski, and others.

Consists of articles, correspondence, notes, miscellaneous material, and printed matter of William McElwee Miller, a Presbyterian clergyman and a missionary in Iran from 1919 to 1962.

Consists of correspondence, manuscripts, and printed material relating to the Fitzgerald biography The Far Side of Paradise (1951) by the literary critic, editor, biographer, author, and educator Arthur Mizener.

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.

This collection contains the manuscripts, correspondence, drawings, and other papers of twentieth-century Guatemalan author Augusto Monterroso, who spent most of his life as a writer in Mexico.