- 18591,039
- 1860 to 18643,251
- 1865 to 18692,593
- 1870 to 18741,927
- 1875 to 18791,772
- 1880 to 18841,777
- 1885 to 18892,450
- 1890 to 18943,205
- 1895 to 18992,819
- 1900 to 19043,152
- 19052,139
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