- 1817 to 1819 267
- 1820 to 1824 413
- 1825 to 1829 389
- 1830 to 1834 513
- 1835 to 1839 864
- 1840 to 1844 1,560
- 1845 to 1849 1,103
- 1850 to 1854 1,348
- 1855 to 1859 1,451
- 1860 to 1864 3,052
- 1865 to 1869 2,504
- 1870 to 1874 1,904
- 1875 to 1879 1,748
- 1880 to 1884 1,756
- 1885 to 1888 1,929
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