- 18611,888
- 1862 to 18642,480
- 1865 to 18662,194
- 1867 to 18691,965
- 1870 to 18711,337
- 1872 to 18741,622
- 1875 to 18761,390
- 1877 to 18791,344
- 1880 to 18811,301
- 1882 to 18841,429
- 18851,153
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