- 1851950
- 1852 to 18541,120
- 1855 to 18561,030
- 1857 to 18591,260
- 1860 to 18612,217
- 1862 to 18642,380
- 1865 to 18662,121
- 1867 to 18691,906
- 1870 to 18711,297
- 1872 to 18741,585
- 18751,166
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