- 1862 to 18632,157
- 1864 to 18652,187
- 1866 to 18671,909
- 1868 to 18691,736
- 1870 to 18711,329
- 1872 to 18731,374
- 1874 to 18751,437
- 1876 to 18771,302
- 1878 to 18791,264
- 1880 to 18811,293
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