Mr Clark published a bird's-eye view of Nottingham Castle in his _Mediæval Military Architecture_, about which he only stated that it was taken from the _Illustrated London News_. It does not agree with the plan made by Simpson in 1617,[542] and is therefore not quite trustworthy; the position of the keep, for example, is quite different. The keep, which Hutchison in his Memoirs speaks of as "the strong tower called the Old Tower on the top of the rock," seems clearly Norman, from the buttresses. It was placed (according to Simpson's plan), on the north side of the small ward which formed the top of the motte, and was enclosed in a yet older shell wall which has now disappeared. The height of this motte is indicated in the bird's-eye view by the ascending wall which leads up it from the bailey. It had its own ditch, as appears by several mentions in the accounts of "the drawbridge of the keep," and "the bridge leading up to the dongeon."[543] It is highly probable that this keep was built by King John, as in a _Mise Roll_ of 1212 there is a payment entered "towards making the tower which the king commanded to be built on the motte of Nottingham."[544] But the first masonry in the castle was probably the work of Henry II., who spent £1737, 9s. 5d. on the castle and houses, the gaol, the king's chamber, the hall, and in raising the walls and enclosing the bailey.[545] The castle has been so devastated by the 17th century spoiler, that the work of Henry and John has been almost entirely swept away, but the one round tower which still remains as part of the defences of the inner bailey, looks as though it might be of the time of Henry II. This bailey is semicircular; the whole original castle covers only 1-2/3 acres. A very much larger bailey was added afterwards, probably in John's reign.[546] Probably this later bailey was at first enclosed with a bank and stockade, and this stockade may be the palitium of which there are notices in the records of Henry III. and Edward I.[547] The main gateway of this bailey, which still remains, is probably of Edward I. or Edward II.'s reign.[548] The castle of Nottingham was the most important one in the Midlands, and William of Newburgh speaks of it as "so well defended by nature and art that it appears impregnable."[549] The value of the town had risen from £18 to £30 at the time of the Survey.[550] [Illustration: FIG. 24. Okehampton, Devon. Penwortham, Lancs. Pevensey, Sussex.]