- 1842 to 1843 998
- 1844 to 1845 762
- 1846 to 1847 750
- 1848 to 1849 857
- 1850 to 1851 975
- 1852 to 1853 966
- 1854 to 1855 965
- 1856 to 1857 1,032
- 1858 to 1859 1,100
- 1860 to 1861 2,121
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