Nobody knows who made the ancient pottery that washes up on St. Phillips Island, a remote 4,600-acre wonderland nestled between Beaufort, SC and Hilton Head Island. The artifacts are plentiful here, appearing along hiking trails, beaches, and the island’s only road that cuts through thick, undisturbed jungles between the marsh and the sea. The impenetrable jungle terrain coupled with the strict conservation efforts of St. Phillips has prevented extensive archaeological examinations of the island. The barrier islands of South Carolina’s Lowcountry have long evoked a sense of mystery that beckons…