<< Although I don't think SC and NC had any boundary shifts circa 1830. >> Greetings from SC. Originally, SC & NC were one geographic unit, the province of Carolina. Although the lines were drawn for separation in the 1700's , there was some refinement of the boundaries (& resulting confusion) into the 1800's. I find the following information on boundaries in Dr. Walter Edgar's book "South Carolina: A History" (USC Press, Columbia, SC, 1998). This is a must- have book for SC researchers. Hope this will be of interest to some fo you-- URQ p. 1 "When Charles II of England granted a second charter to eight Lords Proprietors in 1665, the boundaries of Carolina stretched from ...(the southern border of Virginia) to ... about fifteen miles due south of Daytona Beach) and from the Atlantic to the Pacific. Within those boundaries were... all or portions of fifteen states and northern Mexico." p. 3 [paraphrased from Dr. Edgar's book] Boundary lines were agreed upon in 1735 but surveying errors occurred in 1737 & 1764 placing the border 11 miles south of where it should have been. The final line was set in 1815 (except for a dispute with Georgia that was resolved by the Supreme Court in 1990).