A closer look at some of the remaining exterior facing blocks where they had become detached from the core revealed a curious fact. When they had been placed here in antiquity the backs of these blocks had been cut to fit into and around the deep coves and scallops of existing weathering patterns on the limestone core. The presence of those patterns seemed to imply that the core blocks must have stood here, exposed to the elements, for an immense span of time before they had been faced with granite.
