Professional papers relating to De Vane's research, teaching, and other activities at Yale University. Included are correspondence, writings, speeches, lecture notes, research materials (particularly on Robert Browning), biographical material, and photographs. The academic papers of his wife, Mabel Phillips De Vane, are also part of the collection. They consist chiefly of essays written while she was a graduate student at Yale University, ca. 1925, together with memorabilia and biographical material.