- 1861 to 186414
- 1865 to 186929
- 1870 to 187425
- 1875 to 187928
- 1880 to 188431
- 1885 to 188946
- 1890 to 189442
- 1895 to 189941
- 1900 to 190456
- 1905 to 190958
- 1910 to 191448
- 1915 to 191946
- 1920 to 192455
- 1925 to 192936
- 1930 to 193126
The preservation of the Duke University Libraries Digital Collections and the Duke Digital Repository programs are supported in part by the Lowell and Eileen Aptman Digital Preservation Fund