Taking these things together, we venture to assume that the inner court in which the keep of Dover stands, represents an original motte, or at any rate an original citadel, added to the castle by William I. Whether what now remains of this motte is in part artificial, we do not pretend to say; it may be that it was formed simply by digging a deep ditch round the highest knoll of ground within the ancient ramparts.[403] Anyhow, it is still in effect a motte, and a large one, containing not only the magnificent keep, but a small ward as well. That this keep was the work of Henry II. there can be no manner of doubt; the _Pipe Rolls_ show that he spent more than £2000 on the _turris_ or keep of Dover Castle between the years 1181 and 1187, and Benedict of Peterborough mentions the building of the keep at this date.[404] The curtain around the motte may also be reckoned to be his work originally, as the _cingulum_ is spoken of along with the _turris_ in the accounts. Modern alterations have left little of Norman character in this curtain which shows at a glance, and the gateways (one of which remains) belong to a later period. Attached to this keep ward is another ward, whose rampart is generally attributed to Saxon times. We are not in a position positively to deny that the Saxons had an inner earthwork on the highest part of the ground within their _burh_. But considering that small citadels are unusual in Saxon earthworks: considering also that this bailey is attached to the motte in the usual manner of a Norman bailey, and that its size corresponds to the usual size of an original Norman bailey in an important place, it does not seem unreasonable to suppose that this was the original bailey attached to the Conqueror's motte. Its shape is singular, part of it being nearly square, while at the S.E. corner a large oval loop is thrown out, so as to enclose the Roman Pharos and the Saxon church. The outline of the bailey certainly suggests that it was built after the Pharos and the church, and was built with reference primarily to the keep or motte ward. The nature of the ground, and the necessity of enclosing the church and the Roman tower within the immediate bailey of the castle, which would otherwise have been commanded by them, were the other factors which decided the unusual shape of the bailey.