- 18611,882
- 1862 to 18642,474
- 1865 to 18662,185
- 1867 to 18691,961
- 1870 to 18711,331
- 1872 to 18741,614
- 1875 to 18761,382
- 1877 to 18791,337
- 1880 to 18811,295
- 1882 to 18841,424
- 18851,146
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