1775: SC Regiment Command, per Wells

From History of South Carolina, by Yates Snowden, Henry Gardner Cutler, published 1920, The Lewis Pub. Co., page 316:

According to Well's "Register and Almanac" for 1775 the colonels of the thirteen regiments were as follows: Of the one regiment of horse, William Moultrie; and of the infantry, Charlestown district, Charles Pinckney; Berkeley County, Richard Singleton; Granville County, Stephen Bull, of Sheldon; Craven County, Job Rothmahler; Colleton County, Joseph Glover; Orangeburg, William Thomson; Cheraws, George Gabriel Powell; Ninety-six, John Savage; Camden, Richard Richardson: Forks of Saluda, Robert Starke; Upper Saluda, Thomas Fletchall; New [Acquisition] District, Thomas Neel. Probart Howarth was colonel and governor of Fort Johnson, and Owen Roberts was captain of the artillery company with headquarters in Charlestown.

South Carolina Proprietary Counties, 1682

(click image to enlarge)

In 1682, after the first hard years of settlement, the Proprietors ordered three counties laid out. Berkeley County, centering around Charleston, extended from the Stono River on the south to Seewee Creek (present-day Awendaw Creek) where it emptied into Bulls Bay on the north. Craven County lay north of Berkeley County, and below Berkeley, Colleton County extended to the Combahee River. Later, a fourth county, Granville, was laid out between the Combahee and the Savannah rivers.

(Source: South Carolina Department of Archives and History, http://www.state.sc.us/scdah/guide/countymap2.htm )