Collection
- George Sackville Germain papers, 1683-17851
- George W. and Clara Sargent Shepherd papers, 1919-1965 (majority within 1919-1939)1
- Gerald T. and Charlotte B. Maxson Printed Ephemera Collection, ca. 1750s-1999 (majority within 1850s-1900)1
- Gough family papers, 1804-1926 (majority within 1860-1901)1
- Grosvenor L. Townsend Scrapbooks, 1893-19101
- H. Mark Hildebrandt collection, circa 1860-19861
- Henry Clinton papers, 1736-18501
- Henry Yates Thompson papers, 1863-19281
- Historical Views of Malden Album, 1852-1939 (majority within 1860-1900)1
- Horace Miner collection, 1941-1992 (majority within 1941-1945)1
- Hudson's Bay Company papers, 1775-1914 (majority within 1775-ca. 1790)1
- James O. Gawne report book, 1905-19061
- John Francis diary: Log Brig Mercury, 17911
- John Graves Simcoe papers, 1774-1824 (majority within 1774-1804)1
- June Manning Thomas papers, 1951-2021 (majority within 1990-2010)1
- Kelsey Museum of Archaeology records, 1890-20011
- Knud Lönberg-Holm papers, 1908-1977, undated1
- Laurence Barrett family papers, 1902, 1937-2004 (majority within 1938-1945)1
- Lewis Burnett Kellum papers, 1837-1995 (majority within 1920-1969)1
- Liberty Bell Tour Photograph Album, 19151