As far back as the searcher records go the swamp has always been a part of the island, but there are a number of things about the swamp that lead people to believe it is not a natural occuing part of the island. Interestingly though, there are many other islands in the area that have similar features.
Eye of the Swamp
An article in the colonist states: "While investigating the place they found that the remains of a tolerably well-made road from it to the west shore of the Island, were still discernable. Part of that road may be seen at the present day.".. does this refer to the stone-paved area?