[Sidenote: Ecgfrith]
In spite however of this rapid recovery of its strength by Mercia, Northumbria remained the dominant state in Britain: and Ecgfrith, who succeeded Oswiu in 670, so utterly defeated Wulfhere when war broke out between them that he was glad to purchase peace by the surrender of Lincolnshire. Peace would have been purchased more hardly had not Ecgfrith’s ambition turned rather to conquests over the Briton than to victories over his fellow Englishmen. The war between Briton and Englishman which had languished since the battle of Chester had been revived some twelve years before by an advance of the West-Saxons to the south-west. Unable to save the possessions of Wessex north of the Thames from the grasp of Wulfhere, their king, Cenwealh, sought for compensation in an attack on his Welsh neighbours. A victory at Bradford on the Avon enabled him to overrun the country near Mendip which had till then been held by the Britons; and a second campaign in 658, which ended in a victory on the skirts of the great forest that covered Somerset to the east, settled the West-Saxons as conquerors round the sources of the Parret. It may have been the example of the West-Saxons which spurred Ecgfrith to a series of attacks upon his British neighbours in the west which widened the bounds of his kingdom. His reign marks the highest pitch of Northumbrian power. His armies chased the Britons from the kingdom of Cumbria, and made the district of Carlisle English ground. A large part of the conquered country was bestowed upon the see of Lindisfarne, which was at this time filled by one whom we have seen before labouring as the Apostle of the Lowlands. Cuthbert had found a new mission-station in Holy Island, and preached among the moors of Northumberland as


