Collection
- Henry Carter Adams Papers, 1864-19241
- Henry Moore Bates papers, 1886-19501
- Henry Philip Tappan papers, 1840-1936 (majority within 1840-1881)1
- Henry Romaine Pattengill papers, 1861-19391
- Henry Simmons Frieze papers, 1835-19201
- Henry Wirt Newkirk Papers, 1862-19311
- Herbert Caldwell Smith papers, 1900-19021
- Hinsdale family papers, 1857-19631
- Horace L. Wilgus Papers, 1878-19351
- Howard H. Russell Papers, 1840-19461
- Hussey Family papers, 1876-19261
- Isaac Newton Demmon papers, 1858-19201
- Jabez Thomas Sunderland papers, 1868-19361
- Jacob Ellsworth Reighard Papers, 1887-1942 (majority within 1890-1920)1
- James B. Angell Papers, 1845-19161
- Jesse Siddall Reeves Papers, 1853-1942 (majority within 1901-1942)1
- John Garrett Winter papers, 1901-19541
- Jones family papers, 1860-1950 (majority within 1860-1900)1
- Joseph Beal Steere Papers, 1861-19411
- Junius E. Beal Papers, 1869-19461