- 1842 to 1844 1,139
- 1845 to 1846 827
- 1847 to 1849 961
- 1850 to 1851 995
- 1852 to 1854 1,093
- 1855 to 1856 1,004
- 1857 to 1859 1,232
- 1860 to 1861 2,158
- 1862 to 1864 2,231
- 1865 to 1866 2,039
- 1867 to 1867 1,609
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