The Nonfiction subseries contains Oliver's typescript and autograph manuscripts and notes of nonfiction articles, book and film reviews, speeches, conference papers, and sections of her published memoirs. This subseries is divided in two sections, General (1), and Articles, Speeches, and Notes (2). Each section is arranged alphabetically by subject, and, if there are multiple items on the same subject, the items are arranged chronologically within each subject. The manuscripts in the first section consist of her autobiographical writings, some of which can be identified as drafts of her memoirs, and the material in the second section consists of Oliver's nonfiction writings, arranged by subject. The nonfiction articles are in Spanish and English, and were written for a variety of publications in Latin America, Italy, and the United States. The subjects of Oliver's articles include North American novelists, Cuba in the 1960s, Pablo Neruda, the peace organization World Council of Peace, and reports on her visits to China, India, Ceylon, and the Soviet Union in the 1950s and 1960s.

Organized by historical period, this sub-series contains prints and photographs of America's wars, states, life, and public personalities that were gathered for use in James Truslow Adam's five-volume illustrated chronicle, Album of American History, 1944-1949.