- 1815 to 1819 325
- 1820 to 1824 410
- 1825 to 1829 387
- 1830 to 1834 510
- 1835 to 1839 859
- 1840 to 1844 1,554
- 1845 to 1849 1,095
- 1850 to 1854 1,344
- 1855 to 1859 1,447
- 1860 to 1864 3,042
- 1865 to 1865 1,730
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