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446 Mediceval Military Architecture. between them. It has been suggested that these are pigeon-holes, and no doubt, during a strict siege a good supply of these birds might have been found useful. There are certain holes in the keep at Rochester, that probably were so intended, and that are, or recently were, so used. SUGGESTED ORIGINAL APPEARANCE. The height of the parapet is 6 feet 6 inches, and the pattern of the coping may be seen at the junction with the buttress turrets, and this also shows that the roof was confined to the inner circle, and did not project over the parapet. There are also traces showing that the embrasures contained, as at Alnwick, a hanging shutter.
