- 18591,059
- 1860 to 18643,449
- 1865 to 18692,783
- 1870 to 18742,081
- 1875 to 18791,900
- 1880 to 18841,915
- 1885 to 18892,609
- 1890 to 18943,523
- 1895 to 18993,601
- 1900 to 19043,704
- 19052,517
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