Beyond the well is the rear wall of the Great Hall, built by the same Percy, refitted by the first duke, and rebuilt in 1863. The vaults below with their segmental ribbing are original, as is part of the rear and north wall and of the bow, whence the cross curtain ran to the Postern Tower. This is still the state dining-room, 60 feet by 24 feet, and the vaults fulfil their original destination as cellars. At this point is placed a modern cloister supporting a corridor, by which a bye-access is given to the suite of state-rooms. The original entrance to the hall was by six open steps from the court. Next beyond the hall, pointing to the north-east, is a tower, once the kitchen and scullery, but rebuilt for the second time in 1856, and now the drawing-room, 45 feet by 22 feet. Beyond this, along the north-east front, are the saloon, 42 feet by 22 feet, and an ante-room, 22 feet by 22 feet, built in 1750-86, but newly fitted up. Next to these, and forming the north-west angle of the keep, is Prudhoe Tower, the principal tower in the fortress, upon which the flag is hoisted. This contains the library, 55 feet by 24 feet, and presents two grand bays to the east and west, with a deep re-entering angle between them. This also is modern. Next, on the west front, follows the chapel, built in 1856, a rectangular tower of bold projection, one principal floor, and a high-pitched roof. The two angles are cut off, so as to form a polygonal apse. This conventional east end points, however, south-west. Then, facing to the south-west, follow two half-round towers, rebuilt 1750-86, containing state bedrooms, and connected by a short curtain, within which is a dressing-room. Finally, between these and the gatehouse, completing the circuit of the keep, and projecting due south, is the gallery, having on the first floor a breadth of one line of five rooms and a corridor, and below, the middle gateway. The rooms are the private apartments of the duke and duchess, and a passage communicating with the kitchens. The gateway, which has a portcullis, is of the date of 1309-15, and built into the south curtain, from the outside of which it projects as a mural tower. The gallery replaced a curtain about 1760, and was rebuilt 1856. The battlements of the gatehouse were probably added about 1407-55. The entrance to the state apartments is in the central court, beneath the arched vestibule, at the north-west corner. From this a grand flight of steps ascends to an interior vestibule, and thence by a second flight to the guard chamber, which opens into the state-rooms. These are all on the first floor, the basement being occupied by servants’ rooms.