- McClellan, George Brinton, 1826-1885--Portraits.2
- Mechanicsville Baptist Church (Darlington County, S.C.)2
- Medical fees1
- Medicine1
- Melita (Steamship)2
- Melton, Mary Helen Gore4
- Melton, Samuel Wickliffe, 1830-1899--Correspondence4
- Mergansers1
- Methodists--South Carolina1
- Milford Baptist Church (Greenville County, S.C.)1
- Military occupation1
- Military uniforms1
- Militia4
- Mizpah Baptist Church (Florence County, S.C.)1
- Money1
- Monuments1
- Mortars1
- Mount Ararat Baptist Church (Cherokee County, S.C.)1
- Mount Carmel Baptist Church (Pickens County, S.C.)1
- Mount Moriah Baptist Church (Greenwood County, S.C.)1