- 1854916
- 1855 to 18591,457
- 1860 to 18643,197
- 1865 to 18692,554
- 1870 to 18741,907
- 1875 to 18791,752
- 1880 to 18841,759
- 1885 to 18892,432
- 18902,862
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