- 1794 to 17991
- 1800 to 18192
- 1820 to 18393
- 1840 to 185913
- 1860 to 187922
- 1880 to 189913
- 1900 to 1919100
- 1920 to 1939346
- 1940 to 1959735
- 1960 to 1979548
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