- 1850 to 18546
- 1855 to 18594
- 1860 to 18644
- 1865 to 18693
- 1870 to 18740
- 1875 to 18792
- 1880 to 18840
- 1885 to 18890
- 1890 to 18922
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