- Military engineers1
- Military headquarters1
- Military leaves and furloughs2
- Military passes1
- Minks1
- Mississippi--Maps1
- Missouri--Maps1
- Mollusks1
- Morris Island (S.C.)--History--Civil War, 1861-1865.1
- Morris Island (S.C.)--Pictorial works1
- Morris Island, Battle of, S.C., 1863 (July 10-September 7)3
- 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
- Mount Pisgah Baptist Church (Anderson County, S.C.)1
- Mountain Creek Baptist Church (Edgefield County, S.C.)1
- Mountain Springs Baptist Church (Anderson County, S.C.)1
- Mourning dove1
- Nautical charts--Atlantic States1
- Nautical charts--South Carolina--Charleston Region1