In 1666, Robert Sandford laid claim to "Carolina," the land between Virginia and Florida, while standing on the banks of Bohicket Creek where the village of Rockville is today. Named for the iron ore deposits beneath Wadmalaw Island, Rockville became a village in 1835. Plantation owners from Wadmalaw and other sea islands in Charleston County gathered their families near the region's saltwater during the summer in hopes of surviving the dreaded "miasma,"...