The sides or scarps of these bastions and curtains are faced with a stone wall 30 feet high, and surmounted by a parapet of from 5 feet to 12 feet more; and within this enclosure are contained the middle and inner ward.
The inner ward is formed by placing a second parallelogram, smaller than the last, within it. This forms the inner, and the concentric space between the two, the middle, ward.
IV.—The Middle Ward thus presents four divisions, towards the cardinal points, all forming terraces of from 16 to 20 yards broad, and the opposite sides being of nearly equal length. Upon the east and west are the gatehouses; on the south, offices, and a water gate; and, on the north, an open terrace, overlooking the outer defences of the castle on that side.
The Eastern Gatehouse is formed of two low towers, with half-round projections towards the moat, and a portal between the two. The walls are thick, and there is a lodge on each side, lighted by three loops. Above these lodges was the battlement. On the north side is a square building, the use of which is unknown. This gatehouse was connected with that of the inner ward, and between the two there seem to have been side doors.
One of these, on the south, led to the Water-tank, lined with masonry, 50 feet long by 20 wide, probably a fish-preserve connected with the kitchen.
In front of this gatehouse, and dividing it from the platform of the grand gate, the moat is about 45 feet wide. As there are no traces of a central pier for the drawbridge which must have crossed this space, it seems probable that it rested on an intermediate tressel of timber, as at Raby and Holt, which admitted of being removed or destroyed in the event of a siege.
The Western Gatehouse is placed opposite to the horn-work, and between them is a moat 60 feet wide. The portal is loftier, and the front broader, than in the eastern gatehouse. There are two chambers on either side of the portal, and above them a first story, with fireplaces and chimneys.
Between this gate and the north-west tower of the inner ward are some later buildings, and a wall, which seems to have been intended to cut off the communication between the gatehouse and the north terrace. On the south side is a similar wall, shutting off the south terrace.
The offices and water-gate passage occupy a part of the south terrace of this ward.
The Water-gate Gallery leads from the hall to the lake, and is big enough to contain a boat. It is vaulted by a succession of narrow arches, in steps, instead of by one sloping vault. Above it are chambers, probably for cooks and attendants in the kitchens.