- 18611,876
- 1862 to 18642,466
- 1865 to 18662,181
- 1867 to 18691,955
- 1870 to 18711,327
- 1872 to 18741,610
- 1875 to 18761,379
- 1877 to 18791,335
- 1880 to 18811,292
- 1882 to 18841,420
- 18851,144
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