Beyond this door the staircase rises by twelve steps to a broad landing at the end of the vestibule. Besides the Tudor doorway and window, on the same side, higher up, are loops from two mural chambers of the second floor of the keep, and in the south wall over the stairs a small door, not now used, which opens into the ante-chapel. In the north wall of this vestibule, a doorway of 5 feet opening, the third in order upon the stairs, opens into a passage 6 feet wide, which pierces the wall of the middle tower, here 6 feet thick, the whole tower being 14 feet. From this doorway a flight of twenty steps, 8 feet wide, ascends into the upper vestibule, to a large landing 19 feet by 14 feet. The vestibule itself is 25 feet by 14 feet, and lies between the middle and upper tower of the forebuilding. In the east wall, which has been rebuilt with the roof, are two modern windows. In the south wall a narrow passage, 10 feet long by 3 feet broad, leads to the outer well, the ashlar pipe of which is 4 feet diameter. It seems to have been used in modern times as a cesspit, and is choked up. The well is placed in the centre of the tower, which seems to have been a mass of masonry. At present the wall round the well has been broken away so as to form a rude chamber. It cannot now be ascertained whether the well stopped at this level, as is probable, or was carried up to the roof of the tower. In the north end of the vestibule, looking down upon the staircase, a door leads into a vaulted guard-chamber, 16 feet by 10 feet, with loops to the north and east, and a deep recess in the west wall. In the west wall of the vestibule is the great door of the keep and a loop from the well-chamber. There are traces on this wall of ashlar, as though it was originally intended to vault and groin this vestibule.