- 1860 to 18612,254
- 1862 to 18632,124
- 1864 to 18652,168
- 1866 to 18671,891
- 1868 to 18691,720
- 1870 to 18711,321
- 1872 to 18731,370
- 18741,188
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