- 1846 to 1847 766
- 1848 to 1849 877
- 1850 to 1851 995
- 1852 to 1853 989
- 1854 to 1855 990
- 1856 to 1857 1,060
- 1858 to 1859 1,128
- 1860 to 1861 2,158
- 1862 to 1863 1,981
- 1864 to 1865 1,983
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