- 1821 to 1824464
- 1825 to 1829485
- 1830 to 1834584
- 1835 to 1839969
- 1840 to 18441,642
- 1845 to 18491,193
- 1850 to 18541,415
- 1855 to 18591,525
- 1860 to 18643,325
- 1865 to 18692,649
- 1870 to 18741,960
- 1875 to 18791,801
- 1880 to 18841,808
- 1885 to 18892,485
- 18903,065
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