The story of the missing colony of Roanoke began when John White finally returned to Roanoke on a fifth voyage to the colony, a much-delayed re-supply mission arriving in 1590. At that time, the settlement was found abandoned. The only clues to the colonists' whereabouts were the letters "CRO" carved into the bark of a nearby tree and the word "Croatoan" found carved into the palisade of the fort. It is logical that the colonists left on Roanoke had gone back to Croatoan, as they had already lived there and had had a strong relationship with the natives, some of whom had visited England.