Approximately 12,000 letters to Allan Nevins from various correspondents including James Truslow Adams, Franklin Delano Roosevelt, Harry S. Truman, Willa Cather, Frances Folsom Cleveland, Van Wyck Brooks, Robert Frost, Newton D. Baker, Archibald MacLeish, John D. Rockefeller, Jr., Carl Sandburg, and Henry Wallace; notes and typescripts for Nevins' books including Emergence of Lincoln, The Ordeal of Democracy, Rockefeller, and History and Historians, with notes by editor Ray A. Billington; miscellaneous transcripts, clippings, newspapers, and photographs. Also, autograph letters and manuscripts by presidents, Civil War figures, financiers, politicians, and authors. There are also the Brand Whitlock World War I Diaries and letters to him by such people as Herbert Hoover, Gen. John J. Pershing, and others.

Personal, professional, and family papers of the journalist and writer Wilbertine Teters Worden (1866-1949). Some of the files concern her father, Colonel Wilbert Barton Teters (1836-1923) a Civil War veteran, his military reunions, and his gold mining interests in Colorado. Wilbertine Teters Worden's own manuscripts include both fiction (short stories and poetry) and non-fiction (she often wrote love stories from early American history). The collection also includes her diaries dating from 1885 through 1948. There does not appear to be much in the collection related to Worden's novel, The Snows of Yester-year" (Boston, Arena Publishing Company, 1895).