3. Though the whole of the outer enceinte is generally credited to Hubert de Burgh in Henry III.'s reign, the truth probably is that he built the first stone walls and towers on the outer rampart; but the existence of this earthen rampart shows that there was a wooden wall upon it previously. It is not improbable that it was for the repair of this wooden wall that so much timber was sent to Dover in the reigns of Richard I. and John.[398] Dering, who was lieutenant of the castle in 1629, records the tradition that the tower in the outer enceinte, called Canons' Gate, dates from Saxon times (of course this could only be true of a wooden predecessor of the stone tower), and that Godwin's Tower, on the east side of the outer vallum, existed as a postern before the Conquest.[399] Nearly all the towers on this wall were supported by certain manors held on the tenure of castle-guard, and eight of them still retain the names of eight knights to whom William is said to have given lands on this tenure. Mr Round has shown that the _Warda Constabularii_ of Dover Castle can be traced back to the Conquest, and that it is a mere legend that it was given as a fief to a Fienes. He remarks that the nine wards of the castle named in the Red Book of the Exchequer are all reproduced in the names still attached to the towers. "This coincidence of testimony leads us to believe that the names must have been attached at a very early period; and looking at the history of the families named, it cannot have been later than that of Henry II."[400] May it not have been even earlier? Eight of these names are attached to towers on the outer circuit,[401] and five of them are found as landholders in Kent in Domesday Book. 4. William of Poitiers further tells us that when the duke had taken the castle, he remained there eight days, _to add the fortifications which were wanting_.[402] What was wanting to a Norman eye in Anglo-Saxon fortifications, as far as we know them, was a citadel; and without laying too much stress on the chronicler's eight days, we may assume that the short time spent by William at Dover was just enough for the construction of a motte and bailey, inside the _castrum_ of Harold, but crowned by wooden buildings only.