Nevertheless, the lords of the castles were mostly on the side of Duke Robert. Such were Alan the Black and Ribald his brother, the lords of Richmond and Middleham; Stephen of Holderness, strong in his sea-girt rock of Scarborough; the Mowbrays, Geoffrey, Bishop of Coutance, Justiciary to the Conqueror, and a great soldier; and Robert Mowbray, his brother’s son, who held the impregnable rock of Bamburgh and the great castle of Axholm in the fens of Lincolnshire; both strong, though in a different kind of strength. With them was the powerful Earl Roger of Shrewsbury with his border following; and at a later period Robert de Belesme, his successor, builder of Bridgenorth and Carreghova, and superior lord of many border castles. In the west, Duke Robert was supported by Bernard Newmarch, who held the castles of Brecknock and Builth, and a large and fortified tract of Monmouthshire; with whom were William of Breteuil, son of William Fitz-Osborn, and lord of Hereford; Roger de Lacy of Ewias; and William Earl of Eu, the owner of the strong rock of Hastings, who at that time held the castle and walled city of Gloucester. Besides these great leaders were, on the same side, Ralph Mortimer of Wigmore; Walter Giffard, whose castle on one bank of the Buckinghamshire Ouse, combined with a similar moated mound on the other, commanded that town and its river; Ralph Guader, who held Norwich; and Hugh Bigot, his successor there, lord of Framlingham, after Norwich the strongest place, both in earthworks and masonry, in East Anglia. Between Bristol and Bath the Mowbrays ravaged the country up to the tower of Berkeleyness, the present castle being then but an earthwork; and with them were Hugh de Graintmaisnel, who held Hinckley and Leicester castles; and William de Carileph, at first one of William’s prime councillors; but who afterwards changed sides, and was enabled to do so with safety from his possession of the keep of Durham. Bishop Odo, who held Rochester Castle (even then a place of great strength), and with it the passage of the Medway, placed there Eustace of Boulogne; and himself, with his brother Earl Robert and five hundred knights, held the Roman Pevensey, strengthened by a mound and some other English additions in earth.