- Marshall, Thurgood, 1908-1993.1
- Martin, Lewis--Correspondence1
- Mason, J.B.--Correspondence.1
- McCray, John Henry, 1910-1987--Pictorial works1
- McDonald, Charlie--Correspondence1
- McGill, E.H., d. 19391
- McKnight, Burnese--Pictorial works1
- McNair, Robert E. (Robert Evander), 1923---Correspondence1
- McNeill, Harry J.--Correspondence1
- Mirins, Robert--Pictorial works1
- Montgomery, Eugene A.R.--Correspondence1
- Montgomery, Eugene--Pictorial works1
- Morant, J.H.--Correspondence1
- Morris, James M.--Correspondence1
- Morris, S.S. Jr.--Correspondence1
- Motley, Constance Baker--Correspondence.1
- National Association for the Advancement of Colored People1
- National Association for the Advancement of Colored People. South Carolina Conference--Trials, litigation, etc.1
- National Council of the Churches of Christ in the United States of America.1
- Negro Citizens Committee of South Carolina1