Benjamin G. Kohl (1938-2010) was an author and historian who specialized in the history of the Renaissance. The collection consists of research material and personal papers ranging in date from 1960-2006, including a series of correspondence between Kohl and his mentor, Frederic Chapin Lane.

Douglas Southall Freeman (1886 – 1953) was an American historian, biographer, newspaper editor, and author best known for his multi-volume biographies of Robert E. Lee and George Washington. The collection spans the years 1902-1911, and consists primarily of correspondence between Freeman and his parents.

J. Montgomery Gambrill (1880-1953) was a historian and professor at Columbia University and Johns Hopkins University. This collection consists largely of typed and handwritten correspondence, subject files, and teaching files reagarding his research and administrative duties, from 1794 to 1966.

John Higham was a historian and professor at Johns Hopkins University with a principal field of interest in American social and intellectual history of the nineteenth and twentieth centuries. The collection consists of holographic course notes, outlines, examination booklets, and other assignments completed during his undergraduate years at The Johns Hopkins University, 1937-1939, as well as material relating to Dr. Higham's teaching and writing career.

John Martin Vincent (1857-1939) years was a Professor of European History at Johns Hopkins University. This collection consists of correspondence, scrapbooks, subject files, and personal materials ranging in date from 1881 to 1925. The bulk of the material is correspondence dating from 1900-1910.