- Manuscripts - People and Family Names, 1621/1949, bulk 18001
- Manuscripts Artifact Collection, 1800/20101
- Map Collection, 1629/19911
- Margaret Forbes Brand, Compiler, Genealogies, 1500/19651
- Mining Industry, 1000/20001
- Morley Jeffers Williams Collection, 1602/19672
- Morton Genealogy Collection, 1830/19783