- 1851992
- 1852 to 18541,166
- 1855 to 18561,079
- 1857 to 18591,310
- 1860 to 18612,299
- 1862 to 18642,477
- 1865 to 18662,191
- 1867 to 18691,963
- 1870 to 18711,335
- 1872 to 18741,620
- 18751,198
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