The two eastern towers resemble the others in general features and dimensions, but differ in details. Their basements have one loop towards the middle ward, and their first floor, at the inner ward level, is an irregular pentagon in plan, one angle being square. The doors are in the gorge wall, but do not lead direct into the tower, only into the staircase. In the south-east tower, a stair ascends in the northern wall, curving with it, and forks, the right branch leading to the second floor of the tower, from which alone, by a trap and descending ladder, the first floor and basement were accessible. This floor, like all the rest, was of timber, and from it, on the west side, a second stair commences, and curving with the wall, and having a small garderobe by the way, ascends to the ramparts of the south curtain. Reverting to the lower stair, the branch to the left opens upon the inner face of the east curtain, and ascends by a narrow, open stair, supported on corbels, across the gorge wall of the tower, and up the inner face of the south curtain to its ramparts. The roof and ramparts of the tower are reached by an exterior stair from the rampart of the east curtain. A loop in the hollow between the junction of this tower with the south curtain marks the place of the garderobe already mentioned. Above it was a second upon the battlements of the tower, and at the base of the wall is a large flat-topped sewer descending from the two. The south-east tower bears the name of Mortimer, the south-west that of Bronwen, the fair-bosomed, sister of Brân the Blessed. The north-east, the debtors’ or armourers’, tower has a door in the gorge opening on the left upon a well-stair, 8 feet diameter, which ascends to the second floor only, from which the first floor and basement were reached by a trap and ladder. The second floor is seven-sided, those below cylindrical. As in the south-east tower, an independent stair led from the second floor to the ramparts of the curtain, and upon this curved stair is a garderobe, the loop of which is seen at the junction of the tower with the north curtain, and the mouth or vent at the ground level. The roof of this tower, like the other, is reached from the walls by an external stair. These two towers, having no well-stairs to the roof, have no subordinate turrets. That all these four towers had flat roofs is pretty clear from the position of two corbels in each, evidently intended to carry hammer beams or struts to the one main beam which crossed the aperture, and was thus rendered capable of carrying great weight.