a diocesan administration, and differed on the style of tonsure, and dating of Easter. The southern and east coasts were the areas settled first and in greatest numbers by the settlers and so were the earliest to pass from Romano-British to Anglo-Saxon control. The British clergy continued to remain active in the north and west. After meeting with Augustine, around 603, the British bishops refused to recognize him as their archbishop. His successor, Laurence of Canterbury, said Bishop Dagán had refused to either share a roof with the Roman missionaries or to eat with them. There is no indication that the British clergy made any attempts to convert the Anglo-Saxons. When Æthelfrith of Bernicia seized the neighboring kingdom of Deira, Edwin, son of Ælla of Deira fled into exile. Around 616, at the Battle of Chester, Æthelfrith ordered his forces to attack a body of monks from the Abbey of Bangor-on-Dee, "If then they cry to their God against us, in truth, though they do not bear arms, yet they fight against us, because they oppose us by their prayers." Shortly after, Æthelfrith was killed in battle against Edwin, who with the support of Rædwald of East Anglia claimed the throne. Edwin married the Christian Æthelburh of Kent, daughter of Æthelberht, and sister of King Eadbald of Kent. A condition of their marriage was that she be allowed to continue the practice of her religion. When Æthelburh traveled north to Edwin's court, she was accompanied by the missioner Paulinus of York. Edwin eventually became a Christian, as did members of his court. When Edwin was killed in 633 at the Battle of Hatfield Chase, Æthelburh and her children returned to her brother's court in Kent, along with Paulinus. James the Deacon remained behind to serve as a missioner in the kingdom of Lindsey, but Bernicia and Deira reverted to heathenism. Insular missions The introduction of Christianity to Ireland dates to sometime before the 5th century, presumably in interactions with Roman Britain. In 431, Pope Celestine I consecrated Palladius a bishop and sent him to Ireland to minister to the "Scots believing in Christ". Monks from Ireland, such as Finnian of Clonard, studied in Britain at the monastery of Cadoc the Wise, at Llancarfan and other places. Later, as monastic institutions were founded in Ireland, monks from Britain, such as Ecgberht of Ripon and Chad of Mercia, went to Ireland. In