9. Æthelfrith and the Kymry.—In 593, four years before the landing of Augustine, Æthelric was succeeded by his son Æthelfrith. Æthelfrith began a fresh struggle with the Welsh. We know little of the internal history of the Welsh population, but what we do know shows that towards the end of the sixth century there was an improvement in their religious and political existence. The monasteries were thronged, especially the great monastery of Bangor-iscoed, in the modern Flintshire, which contained 2,000 monks. St. David and other bishops gave examples of piety. In fighting against Æthelfrith the warriors of the Britons were fighting for their last chance of independence. They still held the west from the Clyde to the Channel. Unhappily for them, the Severn, the Dee, and the Solway Firth divided their land into four portions, and if an enemy coming from the east could seize upon the heads of the inlets into which those rivers flowed he could prevent the defenders of the west from aiding one another. Already in 577, by the victory of Deorham (see p. [35]), the West Saxons had seized on the mouth of the Severn, and had split off the West Welsh of the south-western peninsula. Æthelfrith had to do with the Kymry, whose territories stretched from the Bristol Channel to the Clyde, and who held an outlying wedge of land then known as Loidis and Elmet, which now together form the West Riding of Yorkshire.
10. Æthelfrith's Victories.—The long range of barren hills which separated Æthelfrith's kingdom from the Kymry made it difficult for either side to strike a serious blow at the other. In the extreme north, where a low valley joins the Firths of Clyde and Forth, it was easier for them to meet. Here the Kymry found an ally outside their own borders. Towards the end of the fifth century a colony of Irish Scots had driven out the Picts from the modern Argyle. In 603 their king, Aedan, bringing with him a vast army, in which Picts and the Kymry appear to have taken part, invaded the northern part of Æthelfrith's country. Æthelfrith defeated him at Degsastan, which was probably Dawstone, near Jedburgh. 'From that time no king of the Scots durst come into Britain to make war upon the English.' Having freed himself from the Scots in the north, Æthelfrith turned upon the Kymry. After a succession of struggles of which no record remains, he forced his way in 613 to the western sea near Chester. The Kymry had brought with them the 2,000 monks of their great monastery Bangor-iscoed, to pray for victory whilst their warriors were engaged in battle. Æthelfrith bade his men to slay them all. 'Whether they bear arms or no,' he said, 'they fight against us when they cry against us to their God.' The monks were slain to a man. Their countrymen were routed, and Chester fell into the hands of the English. The capture of Chester split the Kymric kingdom in two, as the battle of Deorham thirty-five years before had split that kingdom off from the West Welsh of the south-western peninsula. The Southern Kymry, in what is now called Wales, could no longer give help to the Northern Kymry between the Clyde and the Ribble, who grouped themselves into the kingdom of Strathclyde, the capital of which was Alcluyd, the modern Dumbarton. Three weak Celtic states, unable to assist one another, would not long be able to resist their invaders.
11. The Greatness of Eadwine.—Powerful as Æthelfrith was, he was jealous of young Eadwine, a son of his father's rival, Ælla of Deira. For some years Eadwine had been in hiding, at one time with Welsh princes, at another time with English kings. In 617 he took refuge with Rædwald, the king of the East Angles. Æthelfrith demanded the surrender of the fugitive. Rædwald hesitated, but at last refused. Æthelfrith attacked him, but was defeated and slain near the river Idle, at some point near Retford. Eadwine the Deiran then became king over the united North-humberland in the place of Æthelfrith the Bernician, whose sons fled for safety to the Picts beyond the Forth. Eadwine completed and consolidated the conquests of his predecessors. He placed a fortress, named after himself Eadwinesburh, or Edinburgh, on a rocky height near the Forth, to guard his land against a fresh irruption of Scots and Picts, such as that which had been turned back at Degsastan. He conquered from the Kymry Loidis and Elmet, and he launched a fleet at Chester which added to his dominions the Isle of Man and the greater island which was henceforth known as Anglesea, the island of the Angles. Eadwine assumed unwonted state. Wherever he went a standard was borne before him, as well as a spear decorated with a tuft of feathers, the ancient sign of Roman authority. It has been thought by some that his meaning was that he, rather than any Welshman, was the true Gwledig, the successor of the Duke of the Britains (Dux Britanniarum), and that the name of Bretwalda, or ruler of the Britons, which he is said to have borne, was only a translation of the Welsh Gwledig. It is true that the title of Bretwalda is given to other powerful kings before and after Eadwine, some of whom were in no sense rulers over Britons; but it is possible that it was taken to signify a ruler over a large part of Britain, though the men over whom he ruled were English, and not Britons.
12. Eadwine's Supremacy.—Eadwine's immediate kingship did not reach further south than the Humber and the Dee. But before 625 he had brought the East Angles and the kingdoms of central England to submit to his over-lordship, and he hoped to make himself over-lord of the south as well, and thus to reduce all England to dependence on himself. In 625 he planned an attack upon the West Saxons, and with the object of winning Kent to his side, he married Æthelburh, a sister of the Kentish king. Kent was still the only Christian kingdom, and Eadwine was obliged to promise to his wife protection for her Christian worship. He was now free to attack the West Saxons. In 626, before he set out, ambassadors arrived from their king. As Eadwine was listening to them, one of their number rushed forward to stab him. His life was saved by the devotion of Lilla, one of his thegns, who threw his body in the way of the assassin, and was slain by the stroke intended for his lord. After this Eadwine marched against the West Saxons. He defeated them in battle and forced them to acknowledge him as their over-lord. He was now over-lord of all the English states except Kent, and Kent had become his ally in consequence of his marriage.
13. Character of the later Conquests.—Eadwine's over-lordship had been gained with as little difficulty as Æthelberht's had been. The ease with which each of them carried out their purpose can only be explained by the change which had taken place in the condition of the English. The small bodies of conquerors which had landed at different parts of the coast had been interested to a man in the defence of the lands which they had seized. Every freeman had been ready to come forward to defend the soil which his tribe had gained. After tribe had been joined to tribe, and still more after kingdom had been joined to kingdom, there were large numbers who ceased to have any interest in resisting the Welsh on what was, as far as they were concerned, a distant frontier. Thus, when Ceawlin was fighting to extend the West Saxon frontiers in the valley of the Severn, it mattered little to a man whose own allotted land lay on the banks of the Southampton Water whether or not his English kinsmen won lands from the Welsh near Bath or Gloucester. The first result of this change was that the king's war-band formed a far greater proportion of his military force than it had formed originally. There was still the obligation upon the whole body of the freemen to take arms, but it was an obligation which had become more difficult to fulfil, and it must often have happened that very few freemen took part in a battle except the local levies concerned in defending their own immediate neighbourhood. A military change of this kind would account for the undoubted fact that the further the English conquest penetrated to the west the less destructive it was of British life. The thegns, or warriors personally attached to the king, did not want to plough and reap with their own hands. They would be far better pleased to spare the lives of the conquered and to compel them to labour. Every step in advance was marked by a proportionately larger Welsh element in the population.