S.C. Code § 4-3-170
Darlington County is bounded as follows: on the southwest by Lynch's River and Lee County, beginning at the mouth of Little Lynch's River; thence down Lynch's River a distance of 3 miles near Kelley's Bridge 1/4 of a mile south of said bridge; thence N. 42° E. 3 miles to Ashland Methodist Church; thence N. 22° E. crossing the Chesterfield Road between the property now or formerly owned by J. E. Woodham and the property now or formerly owned by J. W. Gardner 2.62 of a mile to Stuckey's gate on the Old State Road; thence down said road 3/4 of a mile; thence due south 2.62 of a mile to Liberty Hill Church, at the head of Sparrow Swamp; thence down Sparrow Swamp to a point in the Marco Mill Pond near property now or formerly owned by B. A. Howls; thence in Cypress township S. 28° E. 1 1/2 miles to Long Branch; thence up said branch 1/4 of a mile; thence S. 28° E. 1 1/8 miles to Screeches Branch; thence due south 3 miles to the Lamar township line; thence following said line to Lynch's River; thence down said river to Sander's Bridge; thence by an air line running to the point where the Cheraw and Darlington Railroad crosses High Hill Creek; thence down High Hill Creek to its confluence with Black Creek; thence up Black Creek to Muse's Bridge; thence following the direction of a straight line running from Muse's Bridge to Cashua's Ferry until Back Swamp is reached; thence down Back Swamp to Herring Creek; thence down said creek to its confluence with the Great Pee Dee River; thence up the Great Pee Dee to the mouth of Cedar Creek; thence up Cedar Creek and its southernmost branch to the head of the said branch, and thence by direct line S. 51° 45' to the place of beginning.
S.C. Code § 4-3-170