- 1863 to 18642,371
- 1865 to 18662,327
- 1867 to 18692,097
- 1870 to 18712,230
- 1872 to 18742,501
- 1875 to 18762,263
- 1877 to 18792,218
- 1880 to 18812,184
- 1882 to 18842,317
- 1885 to 18862,173
- 1887 to 18893,147
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