- Lutheran Theological Southern Seminary--History1
- Manners and customs1
- Manning, Richard Irvine, 1789-1836--Correspondence1
- Manning, Richard Irvine, 1789-1836--Finance, Personal1
- Marion County (S.C.)--Newspapers1
- Maybank, Burnet R. (Burnet Rhett), 1899-19541
- Mayors--United States, Charleston (S.C.)--Race relations., Police chiefs1
- McBeth, Alexander1
- McCain, James T.1
- Medical University of South Carolina--Graduate students1
- Medical students--South Carolina--Charleston1
- Memphis (Tenn)1
- Miles J. Berkeley1
- Mordecai Cubitt Cooke1
- Moses A. Curtis1
- Motels, Historic buildings, Tourism--Florida1
- Moultrie, William, 1730-18051
- Moultrie, William, 1730-1805--Correspondence1
- Mullen, Rodney, 1966-1
- Muller, Albert A. (Albert Arney), 1800-1