The only clue left by the lost settlers of Roanoke was the word "CROATOAN" carved into a fort's gatepost. This has led to much speculation and debate about what it means and where the settlers went. Some believe that the settlers went to Croatan Island, which is located about 50 miles south of Roanoke Island. Others believe that the settlers were killed by the local Native American tribes. Still others believe that the settlers left Roanoke Island for some other unknown reason.