It is much to be regretted that London was omitted from the Domesday Survey, for that invaluable record might have furnished us with some information as to the building of the Tower, and perhaps revealed in one of those brief but pithy sentences, pregnant with suggestion, some such ruthless destruction of houses as took place in Oxford and elsewhere[8] in order to clear a site for the King's new castle. Unless the site were then vacant, or perhaps only occupied by a vineyard (for these are mentioned in _Domesday Book_ as existing at Holborn and Westminster),[9] some such clearance must obviously have been made for even the first temporary fortifications of the Conqueror, although contemporary history is silent as to this. The _Saxon Chronicle_ tells us that "upon the night of August the 15th, 1077, was London burned so extensively as it never was before since it was founded,"[10] which may have determined William to replace the temporary eastern fortification by an enlarged and permanent castle, he having then completed the conquest of England and crushed the rebellions of his turbulent baronage. [Illustration: PLAN OF THE TOWER OF LONDON ABOUT 1597.] Although the art of the military engineer was then in its infancy, the Conqueror seems to have selected as his architect one already famous for his skill. Gundulf, then just appointed Bishop of Rochester, was no ordinary man. The friend and _protege_ of Archbishop Lanfranc, by whom he had been brought to England in 1070, he had as a young man been on pilgrimage to the Holy Land, and doubtless profited by his travels and the opportunity afforded of inspecting some of the architectural marvels of the Romano-Byzantine engineers. Although Gundulf had rebuilt the cathedral of Rochester, to which he added the large detached belfry tower that still bears his name, built other church towers at Dartford, and St. Leonard's, West Malling (long erroneously supposed to have been an early Norman castle keep),[11] and founded at the latter place an abbey of Benedictine nuns, his reputation as an architect rests chiefly on his having designed the keep of the Tower of London (probably that of Colchester also), and built the stone wall round the new castle at Rochester for William Rufus. While engaged in superintending the erection of London keep, Gundulf lodged in the house of one Eadmer Anhoende,[12] a citizen of London, probably a friend of the Bishop, for we find his name occurring as a generous donor to Gundulf's new cathedral at Rochester, where, by his will, he directed his own body and that of his wife to be interred, and to have an obit annually. Gundulf's work therefore consisted of the great keep (afterwards called the White Tower), which he erected close to the line of the Roman city wall, and some fifteen or twenty feet within it. At first this was probably (like its sister keep at Colchester) only enclosed by a shallow ditch and a high earthen bank, crowned by a stout timber palisade, the city wall