Such was the spot selected in remote times, probably by some wealthy English franklin, for a residence, and adopted by his Norman successors. By one or other, or possibly by both, a deep trench was dug across the neck of the high ground, on the north and north-east, and the slopes were made steeper on the other sides. The central plot, thus isolated, was raised artificially about 15 feet, probably from the surrounding excavations, and works were thus formed which may still be traced amidst the additions and alterations due to many generations of inhabitants. As usual with these concentric earthworks, the inner and higher part, which carried the residence of the lord, was placed out of centre with the outer and lower area. This was intended not only as an outer defence to the citadel, but as a place of security for the dependents, and in times of danger for the herds and flocks. It was important that all these should be placed near together, hence one or two sides of the base court were of large area, while the remainder was narrow and used for defence only. Such is the arrangement at Berkhampstead, Caerleon, Wigmore, Richard’s Castle, Tonbridge, Ewias-Harold, Kilpeck, Shrewsbury, and in many other fortresses where the Norman engineer has built upon the earlier lines, and such is the case at Kenilworth, where the eastern and north-eastern sides of the outer ward are by much the most spacious. The mound, so common in English strong places, and found at the adjacent fortress of Warwick, is not here distinctly visible; the question being, whether its site is occupied by the Norman keep or encroached upon by John of Gaunt’s Hall, both of which are connected with ancient earth-banks. A part of one of these banks is seen on the west front of the inner ward, and, though mutilated, may well represent the original burgh. The Norman keep is also connected with made ground. It includes within its walls a very decidedly artificial mound, from 10 to 15 feet high, against which its walls are built. Kenilworth, as it now stands, is a castle of several periods, but its general plan is original and concentric, the principal additions having been the lake and the outwork beyond it. It is composed of a keep, an inner and outer ward, a lake now drained, a large outwork beyond the lake, and a dam which supported the lake, and across which lay the main approach to the castle.