Defeat and death of Eadwine.—Reaction against Christianity.
Eadwine's conquests roused all his neighbours against him, and in their common fear of the Northumbrian sword, English and Welsh princes were for the first time found joining in alliance. Penda, King of Mercia, an obstinate heathen and a great foe of the gospel, leagued himself with Cadwallon, King of Gwynedd, the greatest of the Christian chiefs of Wales. Together they beset the realm of Eadwine, and the great King of Northumbria fell in battle with all his host, at Heathfield, near Doncaster (632).
The Welsh and Mercians overran Northumbria after slaying its king, and Cadwallon took York and burnt it. The Northumbrians thought that Eadwine's God had been found wanting in the day of battle, and most of them relapsed into paganism in their despair. Paulinus, who had become the first Bishop of York, had to flee away into Kent, the only kingdom where Christians were safe for the moment.
The Irish missionaries.—Columba.
But ere very long the Northumbrians were saved from their despair. Eadwine and the ancient stock of the kings of Deira were swept away, but there were two princes alive of the royal house of Bernicia. Their names were Oswald and Oswiu, and during Eadwine's reign they had been living in exile. Their abode had been among those of the Scots who had crossed over from Ireland and settled on the coast of northern Britain, in the land which now bears their name. There the two brethren had fallen in with the disciples of the good Abbot Columba, the founder of the great monastery of Iona, and from them they had learnt the Christian faith. Columba, whose successors were to convert all the north of England, had been a man of great mark. He was an Irish monk who had left his own land in self-imposed exile, because he had been the cause of a tribal war among his countrymen. Crossing to the Argyleshire coast, he built a monastery on the lonely island of Iona, and from thence laboured for the conversion of the Picts and Scots.
Oswald, King of Northumbria.—Christianity restored.
When Oswald heard of the desperate condition of Northumbria after Eadwine's death, he resolved to go to the aid of his countrymen against the Welsh and Mercians. So he went southward with a few companions, and raised the Bernicians against their oppressors, setting up as his standard the cross that he had learnt to reverence in Iona. His effort was crowned with success, and at the Heavenfield, near the Roman wall, he completely defeated the Welsh and slew their king Cadwallon. Penda the Mercian was driven out of Northumbria also, and for eight years (634-642) Oswald maintained himself as king of all the land between Forth and Trent. He used his power most zealously for the propagation of Christianity. He sent to Iona for two pious monks, Aidan and Finan, who were successively bishops of York under him, and by their aid he so drew his people toward the faith of Christ that they never swerved from it again, as they had done after the death of Eadwine. Oswald also encouraged missionaries to go into the other English kingdoms. It was by his advice that Birinus went from Rome to Wessex, where he converted King Cynegils, and founded the bishopric of Dorchester-on-Thames.
Penda, King of Mercia.—Battle of Maserfield, 642.
But Oswald was not strong enough to put down his heathen neighbour, Penda, the King of Mercia, a mighty warrior who united all the English of central Britain under his sceptre, slaying the kings of the East Angles, and tearing away Gloucester and all the land of the Hwiccas[3] from the kings of Wessex. Penda and Oswald were constantly at war, and at last the Mercian slew the Northumbrian at the battle of Maserfield, in Shropshire, near Oswestry (642).
Oswiu, King of Northumbria.—Conversion of Mercia.