20. =Repulse of the West Saxons.=--After the defeat at Faddiley the West Saxons split up into two peoples. Those of them who settled in the lower Severn valley took the name of Hwiccan, and joined the Britons against their own kindred. This alliance could hardly have taken place if the Hwiccan, in settling in the Severn valley, had destroyed the whole, or even a considerable part, of the Celtic population, though there can be little doubt that there was still slaughter when a battle was fought or a town taken by storm; as it is known that the magnificent Roman buildings at Bath were standing in ruins and the city untenanted many years after the capture of the city. At all events, the Britons, now allied with the Hwiccan, defeated Ceawlin at Wanborough. After this disaster, though the West Saxon kingdom retained its independence, it was independent within smaller limits than those which Ceawlin had wished to give to it. If he had seized Chester he would have been on the way to gain the mastery over all England, but he had tried to do too much in a short time. His people can hardly have been numerous enough to occupy in force a territory reaching from Southampton Water to Bedford on one side and to Chester on another. 21. =The Advance of the Angles.=--Whilst the West Saxons were enlarging their boundaries in the south, the Angles were gradually spreading in the centre and the north. The East Anglians were stopped on their way to the west by the great fen, but either a branch of the Lindiswara or some new-comers made their way up the Trent, and established themselves first at Nottingham and then at Leicester, and called themselves the Middle English. Another body, known as the Mercians, or men of the mark or border-land, seized on the upper valley of the Trent. North of the Humber the advance was still slower. In =547=, five years before the West Saxons attacked Sorbiodunum, Ida, a chieftain of one of the scattered settlements on the coast, was accepted as king by all those which lay between the Tees and the Forth. His new kingdom was called Bernicia, and his principal fortress was on a rock by the sea at Bamborough. During the next fifty years he and his successors enlarged their borders till they reached that central ridge of moorland hill which is sometimes known as the Pennine range. The Angles between the Tees and the Humber called their country Deira, but though they also united under a king, their progress was as slow as that of the Bernicians. Bernicia and Deira together were known as North-humberland, the land north of the Humber, a much larger territory than that of the modern county of Northumberland.