- 1854950
- 1855 to 18591,504
- 1860 to 18643,296
- 1865 to 18692,624
- 1870 to 18741,937
- 1875 to 18791,781
- 1880 to 18841,790
- 1885 to 18892,463
- 18902,899
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