S.C. Code § 4-3-520
Williamsburg County is bounded as follows: on the southwest by Berkeley County from which it is separated by the Santee River; on the north and northwest by Clarendon and Florence Counties; on the east and southeast by Marion County from which it is separated by the Great Pee Dee River and by Georgetown County from which it is separated by a line commencing on the Great Pee Dee River, the dividing line between Williamsburg, Marion and Georgetown Counties, and running to the road leading from Britton's and Bradley's Ferry, on said Great Pee Dee River, to Leneud's Ferry, on Santee River, the said road being the boundary line on the southeast separating it from Georgetown County, less the following territory transferred to Florence County by act of the General Assembly, approved March 4 1921, to wit: beginning at a point in the road leading to Lee's Cross Road, where same crosses Lynche's Lake and running S. 12° 30' W. 1943 feet, thence S. 8° 10' W. 526 feet, thence S. 14° 30' E. 1119 feet, thence S. 25° 20' E. 730 feet, thence S. 72° 20' E. 43610 feet to a stake at the road leading from Indiantown to Kingstree, thence N. 26° E. 316 feet, thence along the Kingstree road N. 71° 35' E. 10094 feet, thence 504 feet along said road to the intersection of Owens Swamp, thence 527 feet along said road, thence 806 feet along said road, thence N. E. 711 feet, thence N. E. 559 feet, thence E. 506 feet, thence S. E. 1225 feet to a point in the center of said road, thence N. E. 3380 feet along center of said road, thence 2315 feet to where it intersects Flannigan's Creek, thence along Muddy Creek to the intersection of Clark's Creek, thence along Clark's Creek to the intersection of Pee Dee River, thence along Pee Dee River to the mouth of Lynche's River, thence along Lynche's River to the mouth of Lynche's Lake, thence along Lynche's Lake to the beginning point, containing 45.3 square miles according to map made by J. W. Coggshall and T. E. Wilson, civil engineers, April 18 1920, and filed in the Governor's office and in the office of the clerk of court of Florence County. For a more accurate description reference to said plat is hereby made.
S.C. Code § 4-3-520