be within the third dyke." The motte, which still exists, was on the south-eastern edge of this ward; that is, it was so placed as to overlook both the borough and the ford over the Thames.[740] It was ditched around, and is said to have had a stone keep on the top; but no foundations were found when it was recently excavated. It was found to rest on a foundation of solid masonry several feet thick, sloping upwards towards the outside, so that it must have stood in a kind of stone saucer.[741] The masonry which remains in the other parts of the castle is evidently none of it of the early Norman period, unless we accept a fragment of wall which contains courses of tiles. Numerous buildings were added in Henry III.'s reign; the walls and battlements were repaired, and the _hurdicium_, which had been blown down by a high wind, was renewed.[742] But the motte and the high banks show clearly that the first Norman castle was of wood. The value of the royal borough of Wallingford had considerably risen since the Conquest.[743] WARWICK (Fig. 36).--Here again we have a castle built on land which the Conqueror obtained from a Saxon convent, a positive proof that there was no castle there previously. Only a small number of houses was destroyed for the castle,[744] and this points to the probability, which is supported by some other evidence, that the castle was built outside the town. Warwick, of course, was one of the boroughs fortified by Ethelfleda, and it was doubtless erected to protect the Roman road from Bath to Lincoln, the Foss Way, against the Danes. Domesday Book, after mentioning that the king's barons have 112 houses in the borough, and the abbot of Coventry 36, goes on to say that these houses belong to the lands which the barons hold outside the city, and are rated there.[745] This is one of the passages from which Professor Maitland has concluded that the boroughs planted by Ethelfleda and her brother were organised on a system of military defence, whereby the magnates in the country were bound to keep houses in the towns.[746] Ordericus, after the well-known passage in which he states that the lack of castles in England was one great cause of its easy conquest by the Normans, says: "The king _therefore_ founded a castle at Warwick, and gave it in custody to Henry, son of Roger de Beaumont."[747] Putting these various facts together, we may fairly assert that the motte which still forms part of the castle of Warwick was the work of the Conqueror, and not, as Mr Freeman believed, "a monument of the wisdom and energy of the mighty daughter of Alfred,"[748] whose energy was very much better employed in the protection of her people. Dugdale, who also put the motte down to Ethelfleda, was only copying Rous, a very imaginative writer of the 15th century.