BREMESBYRIG.--This place has not yet been identified. Bromborough on the Mersey has been suggested, and is not impossible, for the loss of the _s_ sometimes occurs in place-names; thus Melbury, in Wilts, was Melsburie in Domesday. Bremesbyrig was the first place restored after Chester, and as the estuary of the Dee had been secured by the repair of Chester, so an advance on Bromborough would have for its aim to secure the estuary of the Mersey. It was outside the Danish frontier of Watling Street, and could thus be fortified without breach of the peace in 911. There is a large moated work at Bromborough, enclosing an area of 10 acres, in the midst of which stands the courthouse of the manor of Bromborough. But this manor was given by the Earl of Chester to the monks of St Werburgh about 1152, and it is possible that the monks fortified it, as they did their manor of Irby in Wirral, against the incursions of the Welsh. One of the conditions of the Earl's grant was that the manor is to be maintained in a state of security and convenience for the holding of the courts appertaining to Chester Abbey.[75] Thus the fortification appears to be of manorial use, though this does not preclude the possibility of an earlier origin. On the other hand, if Bromborough is the same as Brunanburh, where Athelstan's great battle was fought (and there is much in favour of this), it cannot possibly have been Bremesbyrig in the days of Edward. Another site has been suggested by the Rev. C. S. Taylor, in a paper on _The Danes in Gloucestershire_, Bromsberrow in S. Gloucestershire, one of the last spurs of the Malvern Hills. Here the top of a small hill has been encircled with a ditch; but the ditch is so narrow that it does not suggest a defensive work, and it is remote from any Roman road or navigable river. SCERGEAT has not yet been identified. Mr Kerslake argued with some probability that Shrewsbury is the place;[76] but the etymological considerations are adverse, and it is more likely that such an important place as Shrewsbury was fortified before Edward's time. Leland calls it Scorgate, and says it is "about Severn side."[77] It should probably be sought within the frontier of Watling Street, which Ethelfleda does not appear to have yet crossed in 911. BRIDGENORTH is undoubtedly the Bricge of the _Anglo-Saxon Chronicle_, as Florence of Worcester identifies it with the Bridgenorth which Robert Belesme fortified against Henry I. in 1101.[78] Bridgenorth is on a natural fortification of steep rock, which would only require a stout wall to make it secure against all the military resources of the 10th century. We may therefore be quite certain that it was here Ethelfleda planted her borough, and not (as Mr Eyton unfortunately conjectured) on the mound outside the city, in the parish of Oldbury.[79] This mound was far more probably the site of the siege castle (no doubt of wood) which was erected by Henry I. when he besieged the city.[80]