The junction of these two kingdoms under Æthelfrith, about 600, established the Kingdom of Northumbria; thus was begun the process of consolidating the several divided English kingdoms. This tendency to consolidation is marked by the title of Bretwalda, which is given to the chief of the nation dominant for the time being. The name had been applied to Ella of Sussex, to Ceawlin of Wessex, and was held at the time of the establishment of the Northumbrian power by Æthelberht of Kent. There were thus two pre-eminent powers among the English--Northumbria, under its king Æthelfrith, claiming supremacy over the middle districts of England, including the Mercians and Middle English; and Kent, under Æthelberht, paramount over Middlesex, Essex, and East Anglia; while a third kingdom, that of Wessex, though large in extent and destined to become the dominant power, was as yet occupied chiefly in improving its position towards the west. Beyond these lay the district still in the possession of the Britons. The possessions of this people were now divided by the conquest of the English into three--West Wales, or Cornwall; North Wales, which we now call Wales; and Strathclyde, a district stretching from the Clyde along the west of the Pennine chain, and separated from Wales by Chester, in the hands of the Mercians, and a piece of Lancashire in the hands of the Northumbrians. [Sidenote: Conversion of the English. 597.] It was while the kingdoms of Northumbria and Kent were thus in the balance that the conversion of the English to the Christian faith began. Æthelberht of Kent had married Bercta, the daughter of the Frankish King of Paris. She was a Christian; and Gregory the Great at that time occupying the Roman See, which was rapidly rising to the position of supremacy in the Christian Church, took advantage of the opening thus afforded, and despatched a band of missionaries under a monk named Augustine to convert the people. In 597 they landed in Thanet. By the influence of the Queen they were well received, and established themselves at Canterbury, which has ever since retained its position as the seat of the Primacy. The Kings of Essex and East Anglia followed the example of their superior Lord, and became Christians. The Northern kingdom was still heathen. But Eadwine, who succeeded Æthelfrith on the Northumbrian throne, surpassed his predecessor in power. On Æthelberht’s death, he received the submission of the East Anglians and men of Essex, and conquered even the West Saxons. Kent alone remained independent, but was compelled to purchase security by a close alliance with Eadwine, who married a Kentish princess. With her went a priest, Paulinus; and priest and Queen together succeeded in converting Eadwine, and bringing the Northern kingdom to Christianity. Heathenism was however not extinct. It found a champion, Penda, King of the Mercians. In alliance with the Welsh king he attacked and defeated Eadwine, in 633, at the