Collection
- Maples Family Photograph Album, ca. 1860-19002
- Marguerite H. Voll photograph album, ca. 1909-19202
- Marion E. Grusky Rucker collection, 1919-2017 (majority within 1940s-1950s)2
- Martha Louise Day self-portraits album, [circa 1878]2
- Mary A. Lincoln collection, 19036
- Massachusetts account book, 1862-18642
- Matthilde Ittel Photograph Album, ca. 1905-19112
- Maury family papers, 1782-1979 (majority within 1820-1872)15
- Merchant's asset, liability, and inventory ledger, 1878-18942
- Michigan collection, 1759-19599
- Michigan, Ohio, Illinois Family Photograph Albums, ca. 1860-18952
- Mifflin family papers, 1689-18774
- Mildred Wood and Mary Wood composition book, 1907-19162
- Mills Family Photograph Album, ca. 1890-19054
- N. B., "The Coming Man A Tragedy" manuscript, 18592
- Nathanael Greene papers, 1762-1852 (majority within 1780-1785)60
- Native American collection, 1688-1921146
- Nelson Miles European Travel Photograph Album, ca. 18972
- New England, Boston, Bridge Engineering Collection, ca. 19082
- Newsboys' and Children's Aid Society case book, 1886-18872