- 1766 to 1779165
- 1780 to 1799498
- 1800 to 1819936
- 1820 to 18391,362
- 1840 to 18593,315
- 1860 to 18796,365
- 1880 to 18996,604
- 1900 to 191911,660
- 1920 to 192910,062
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