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On the wall along the west or landward side, on the other hand, where nature afforded no protection, every appliance within the power of the art of fortification in those times was ex
It consisted, as its           discovered remains exactly tallying with the description of Polybius have shown, of an outer wall 6\ feet thick and immense casemates attached to it behind, probably along its whole extent ; these were separated from the outer wall by a covered way 6 feet broad, and had a depth of 14 feet, exclusive of the front and back walls, each of which was fully 3 feet broad.