- Records of the Harvard College Class of 1890 include the following information by or about Du Bois:
- Class of 1890 Secretary’s file, Du Bois folder, HUD 290.505 Du Bois W.E.B. (VT)
- The following alumni reports include entries by or about Du Bois:
- Secretary’s report. no. 3, 1897, HUD 290.7, page 38
- Secretary’s report no. 4, 1903, HUD 290.13, page 42
- Secretary’s report no. 5, 1903-1909, HUD 290.19, page 42
- Twenty-fifth anniversary report, 1890-1915, Secretary’s report no. VI, 1903, HUD 290.25, pages 94-95 (autobiographical information) and unnumbered page following page 96 (photographs)
- Seventh report of the Class of 1890 of Harvard College, thirtieth anniversary, 1920, HUD 290.30, pages 65-66
- Harvard College Class of 1890 fiftieth anniversary report, report no. 9, 1930-1940, HUD 290.50, page 27
- The Harvard Class of 1890 tenth report, 1950, HUD 290.60, includes entries for Du Bois on the list of reunion attendees and on the address list.
- Harvard College Library letters, 1826-1914. Correspondence, 1902-1903 UAIII 50.8 Box 91, contains two letters from Du Bois, requesting assistance in compiling a bibliography of American Negro folk songs.
- Records of the Harvard College Library: William Coolidge Lane general files, 1897-1928, UAIII 50.8.10.2, Box 12, Folder Du-DG, contains a letter from Du Bois, writing in 1908 from the Atlanta University Department of Sociology, asking about library statistics.
- Papers of Albert Bushnell Hart, 1841-1943: General correspondence 1911-1920, HUG 4448.17, Box 2, Folder D & E contains correspondence, 1918, between Du Bois and Hart regarding Hart’s membership on the advisory board for a proposed History of the American Negro in the Great War.
- Records of the President of Harvard University, Abbott Lawrence Lowell, 1909-1933. UAI 5.160 Box 297 Folder #504 contains two letters: an inquiry from Du Bois soliciting a statement regarding black students at Harvard, June 25, 1931, and a reply from Lowell, June 26, 1931.