Collection
- Griffin family and Lydia Sigourney papers, 1807-188533
- Grisson Family Photograph Album, ca. 1863-18952
- H. Merriman European Travel Photograph Album, 18922
- Haiti collection, 1761-1826, 1856, 1895, 19547
- Hank Hanft letters, 19192
- Hattie A. Abbott expense book, 18802
- Henry Burbeck papers, 1735, 1775-1866 (majority within 1802-1813)38
- Henry Clinton papers, 1736-1850293
- Henry Fairfield Osborn papers, 1879-18854
- Henry Stafford Little collection, 1843-18449
- Henry Stevens papers, 1812-193527
- Henry Vignaud papers, 1840-1922 (majority within 1860-1915)40
- Hiram Bedford diary, 18692
- Hubble family scrapbooks, ca. 1870s-1880s2
- Hubert S. Smith Naval letters and documents, 1458-1915 (majority within 1746-1915)8
- Hugh Fred Cameron Photograph Album, 1898-19122
- Individual newspaper issues collection, 1733-19853,072
- Isaac S. Clough collection, 1856-18832
- Israel Snow Papers, 1829-1904 (majority within 1829-1869)5
- J. B. Cooke collection, 18892