- 18611,880
- 1862 to 18642,472
- 1865 to 18662,183
- 1867 to 18691,957
- 1870 to 18711,329
- 1872 to 18741,611
- 1875 to 18761,380
- 1877 to 18791,336
- 1880 to 18811,293
- 1882 to 18841,421
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