In Volume II of the SC UDC series "Recollections and Reminiscences" there are a series of letters written by a fellow named S.M. Crawford who was apparently a member of either the 1st, 2nd or 3rd SC Cav. A letter on page 230 describes the fighting around Charleston in July 1864 and is dated Adams Run, July 7, 1864.
The letters end on Jan. 7, 1865 on page 243.
Bryce