One hundred feet square of land on Haddrell’s Point in Charleston County, conveyed by Mrs. Rebecca Bee Barksdale for the use of the United States, has been ceded to the United States for the purpose of erecting a beacon thereon. But nothing contained in such cession shall be construed to exclude or prevent any process, civil or criminal, issuing from the courts of this State from being served or executed within the limits of such cession.