Although the king of the East Angles received baptism in Kent at the bidding of AEthelberht, he fell back into idolatry on his return to his own land. And as AEthelberht's son, Eadbald, was a pagan, many of the Kentishmen and East Saxons also deserted Christianity when he became king. Eadbald was converted by Laurentius, and did what he could to forward the cause of Christ. With AEthelberht's death, however, the greatness of Kent passed away, and Eadbald could not insist on the destruction of idols even in his own country. While Kent sank into political insignificance the Kentish mission made one great advance, and then ended in failure. The Northumbrian king, Eadwine, who reigned over the two Northumbrian kingdoms, Bernicia and Deira, from the Forth to the Humber, and gradually established a supremacy over the whole English people except the Kentishmen, married AEthelburh, the daughter of AEthelberht. She was accompanied to her new home by Paulinus, who was ordained bishop by Justus, the successor of Mellitus; and Boniface V. wrote to her exhorting her to labour for the conversion of her husband, and saying that he would not cease to pray for her success. His prayers were heard; Eadwine was baptized, and made his capital, York, the seat of the bishopric of Paulinus. The people of Deira (Yorkshire) followed their king's example, while Bernicia, though Paulinus preached and baptized there, remained, on the whole, heathen; no church was built and no altar was raised. South of the Humber the authority of Eadwine and the preaching of Paulinus effected the conversion of Lindsey, and of the king, at least, of the East Angles. In 633, however, Eadwine was defeated and slain by Penda, the heathen king of Mercia, and Cadwallon, the Briton. Heathenism was already triumphant in East Anglia, and on Eadwine's death many of the Northumbrians relapsed into idolatry. AEthelburh and her children sought shelter in Kent, and Paulinus fled with them. Only one Roman clergyman, the deacon James, remained in Northumbria to labour on in faith that God's cause would yet triumph there. Ignorant of the calamity that had befallen the Church, the Pope, in pursuance of Gregory's scheme, sent the pall to Paulinus. When the papal gift arrived in England the Church of York had been overthrown, and Paulinus had been translated to Rochester. [Sidenote: Independent missions.] [Sidenote: Foundation of the see of Lindisfarne, 635.]