Passing into details, the court of the inner ward is about 164 feet north and south, by 132 feet east and west. The opposite sides are not quite equal, nor are its angles right angles, though nearly so. The curtains are about 40 feet high; that to the west is 10 feet thick, the others are 11 feet. The parapet was 3 feet thick, and the rear wall 2 feet, leaving 5 feet to 6 feet for the walk. The two western towers are circular, and 34 feet diameter, having three-fourths of their circumference exposed outside. Within, the gorge wall fills up the angle of meeting of the curtains and contains the entrance-door. The basement chamber is below the inner ward level and circular. The first floor, at the ward level, is polygonal, as are the two upper floors. None are vaulted, and the basement has neither loops nor stairs of access. Each of these two towers has a well-stair at its junction with the western curtain, lighted by five loops placed one over the other in the hollow angle between the tower and the curtain, outside. The stairs ascend 20 feet above the tower, in a round turret, battlemented on small corbels. Each turret has a door upon the tower roof. The staircases commence at the first floor, on or level with the inner ward, and open on each floor, but not upon the ramparts of the curtain. The upper floor has fireplaces with hoods. Outside, these towers rise from the ground without slope or cordon; two string-courses, however, mark the level of the two upper floors. The stairs are broken away, and the upper rooms inaccessible; but certain exterior loops show the existence of two tiers of small chambers (no doubt garderobes) in the north and south curtains, where they join the towers. Moreover, on the outside of each of these curtains, next to the tower, is a broad, flat buttress, thrown out to give space and support to these chambers and to contain the sewer-shaft from them. On the north wall, the buttress is of good ashlar of the age of the tower. On the south wall, it is of rude, inferior work, as though an addition. It may have been rebuilt. In the north curtain there seems to be a third chamber at a lower level. The drain here is not seen; on the south face it is open. Where these towers meet the rampart-walk they block it up; a sort of gallery is, therefore, thrown out on corbels, across the angle, and thus, as at Conway, the rampart-walk is carried on.