Two openings have been broken into this chamber from the outside, on the east and west sides. Why nine feet of masonry should have been twice pierced, at immense labour, it is difficult to say; nor is there any trace of door or loop which might have made the task easier, or have suggested these openings. The broken walls do, however, show at the very base of the structure, on each side, a horizontal or nearly horizontal square drain, of very rough construction, in the substance of the wall. These holes have been the subject of much speculation. They were evidently drains from the upper floors of the tower, collected to fall into one outlet. Such drains may be seen in the heart of an overthrown solid tower at Corfe. It is not improbable that one of the breaches may have contained a recess or garderobe, which communicated with the drain, and suggested the penetration of the wall in that direction. The first floor, of 17 feet 9 inches clear diameter, was entered by an exterior door in the wall, at the level of the cordon, or 12 feet above the ground, on the east side. There must have been exterior steps; but they did not bond into the wall, and may have been of wood. The door has 3 feet 3 inches opening, with a drop arch and plain chamfered moulding. It was defended by an interior door; but there was no portcullis or other defence. The door-recess is 4 feet broad, and has a drop arch. This floor had two windows towards the north and south-west, the openings of which are about 18 inches broad, with plain equilateral heads. The former opens from a recess 7 feet 4 inches broad, having stone side-seats; between which, in the floor, is the trap descending into the dungeon. The other window has a recess 6 feet 10 inches broad, with a stone seat on its left side. In its right, or west jamb, is a door 2 feet 5 inches wide, square headed, beneath a drop relieving arch; from which rises a mural stair 2 feet 5 inches broad, lighted by two exterior loops, and with a flat covering, leading to the second floor. The window recesses are segmental, and are formed of excellent limestone tufa ashlar.