Mediæval Military Architecture in England, Volume 1 (of 2)

by George Thomas Clark

The main entrance, approached by a steep and winding road from the town, is in the north end, or at the point of the cape, between the two towers. Entering, is a second gatehouse, opening from the outer into the inner ward, also between two towers. A third gatehouse, at the other end of the fortress, leads direct from the exterior into the south end of the inner ward, and thus opens a communication with the root of the cape. There is also a lateral postern with vaulted passages in the west wall of the outer ward.

Outside the wall, encircling it closely, is the ditch, the most striking feature in the whole fortress. This is in general plan not unlike the long section of a pear, the northern end being the smaller, and the western side flattened so as to be nearly straight. The counterscarp of this ditch includes an area of about 5 acres. The ditch itself, measured from the level of the foot of the wall crowning its scarp, is about 60 feet deep, with slopes of 1 foot horizontal to 2 feet vertical, and about 70 feet broad. It is only just not too steep to be covered with short turf. The crest of the counterscarp is a ridge about 6 feet broad, and about 20 feet below the level of the foot of the wall. From it descends another slope, equally steep, but much deeper; on the west side descending about 150 feet to the bottom of the valley, and on the east to a rather less depth, as here this “glacis” is succeeded by a sort of broad terrace of pasture land, which falls gently towards the river, the level of which may be 250 feet below the platform of the castle. In many respects these defences resemble those of Bramber, in Sussex.

At the north-west end the ditch is traversed by a very modern causeway of earth, which supersedes the earlier drawbridge. At the south end, where the ground is highest and the ditch about 50 feet deep and 80 feet broad, there remain two engaged piers upon the scarp and counterscarp, and between them two detached piers, of which the outer has fallen against the inner. All are rectangular; and the inner of the detached two is considerably the larger, and probably carried a tower for the protection and working of a double drawbridge. These piers are of flint rubble, cased with ashlar, of which a small part only remains.

At the outer end is the earthwork of a tête du pont, or ravelin, of triangular plan, the passage from which was a little to the east side of the apex. This work was evidently constructed when artillery was in use, and is attributed to Henry IV., during the campaign of 1589. It no doubt represents an earlier barbican, also of earth and timber. There are no traces of masonry beyond the bridge. This work opens upon the ridge of the promontory, which widens and rises somewhat higher to the south. The ground is scarred with banks and ditches, the remains of fieldworks of various dates, both of attack and defence.

The design of this castle ditch is peculiar. The more obvious plan would have been to place the walls upon the edge of the hill, and scarp its sides down to the valley with such steepness as suited the ground. Instead of this, the upper 40 feet of the hill, being chalk rock, was scarped vertically, and then faced or revetted by a wall, upon which was placed the enceinte wall of the inner ward. At the foot of the revetment was then excavated the ditch just described, the material being thrown outwards so as to form an artificial scarp, which thus became a sort of advanced banquette or earthwork beyond the ditch, representing the crest of the glacis, and capable of being held by a line of soldiers, but which, when taken, was too exposed and too narrow to allow of its being held, or of cover being constructed upon it. This banquette was at a rather lower level than the foot of the opposite wall.

Such an arrangement is found in other castles in Normandy, and notably, as pointed out by M. Deville, at Molineaux, De Longueville, Bec de Montagne, and in the later work of Château-Gaillard, where, however, it is less marked.

The keep is rectangular, about 80 feet north and south by 70 feet east and west, and at present about 60 feet high. It stands in the south-west corner of the inner ward, close to the enceinte wall, of which its south-west angle forms a part. Its walls at the ground level are about 13 feet thick. It presents three buttresses on the north face and two on the south—the third being a sort of cap thickening and enveloping the south-east angle. These are of the unusual breadth and projection of 9 feet, and they rise to the present, which cannot be above 10 feet below the original summit. At the north-east angle the adjacent buttresses are set square, leaving the angle free. The south face is plain, or nearly so, excepting the cap at its south-east angle, which extends southwards, and is connected with the adjacent enceinte wall. The west face is plain, outside of which was the entrance.

This is composed of a flight of steps, beginning upon the north face, passing by a doorway through its most westerly buttress, and which then, turning, is continued along the west face, until at its south end it lands in the usual square appendage or forebuilding common in these keeps. This staircase was guarded by an exterior wall, and had gateways at its foot and its summit. It was covered over, as appears from marks upon the wall; and above it was no doubt the usual platform for defence. In the basement of the forebuilding, which forms also part of the enceinte wall, was a vaulted chamber opening into the basement of the keep, as at Rochester, either a store or a prison. The landing story was barrel-vaulted, having at one end a loop towards the field, and at the other a door in the wall of the keep.

Entering this door, the staircase is continued southward in the wall of the keep, up a roughly-vaulted, round-headed, mural gallery, until at the angle it reaches the level of the first floor. The gallery now turns the angle, and is continued on the level half-way along the south wall, when it is stopped abruptly. A door on the right leads upon the enceinte rampart, and one on the left probably led into the keep.

The interior of the keep is composed of a basement and an upper or, perhaps, two floors, divided by a north and south wall into two chambers on a floor. This division-wall is said to be original, and ought to be so in a keep of this size, but it looks of the sixteenth century, and may represent an older one. The west basement is much choked up with rubbish. The east chamber is tolerably clear, and shows an exterior aperture in its east wall, near the south end, which communicates with the adjacent south gateway. This may be original, but it is now a mere hole. In the north wall is a short mural gallery, entering a well-stair in the north-east angle, which ascends to the first floor and chapel only. The lower stage was not vaulted. The first floor has four windows on the north side, two in each room, and one on the east side. The second floor had also similar windows on its north, and a vaulted chamber on its east side; no doubt a chapel. This chapel is formed by throwing a vault from buttress to buttress for its floor, and at a higher level for its roof, and above this were the leads. There are traces of similar chambers on the north front. The upper story has been vaulted in six bays, three on each side, duly groined and ribbed, as is shown by the springers. The material and the workmanship, no less than the section of the ribs, show this to be a late addition, probably of the sixteenth century.