The Irish mission in England began at a critical time, just when the reaction against the earlier successes of the Roman mission had set in. At York, under Paulinus, Christianity had triumphed; but eight years after that event Edwin, the Christian king of Deira, perished in battle, and northern England was forced back by king Penda into paganism. Southern England, with the exception of Canterbury and a considerable part of Kent, had also lost the Gospel, after possessing it for thirty years. Nearly at the same time East Anglia and Essex, at the command of pagan-kings, had discarded it likewise. It was then that Oswald, on recovering his kingdom of Northumbria, besought the Irish monks of Iona to reconvert it, or rather to complete a conversion which had been but begun. Their work prospered; by degrees the largest kingdom of the Heptarchy became solidly and permanently Christian, its See being fixed in the Island of Lindisfarne, whence the huge diocese of the north was ruled successively by three of St. Columba's order, Aidan, Finan, and Colman. But the labours of St. Columba's sons were not confined to the north. In East Anglia an Irish monk, St. Fursey, founded on the coast of Suffolk the monastery of Burghcastle, in which King Sigebert became a monk. An Irish priest, Maidulphus, built that of Malmesbury in Wessex. Glastonbury was an older Celtic monastery inhabited partly by Irish monks, and partly by British. Peada, king of Mercia, son of the terrible Penda, was baptized by St. Finan close to the Roman Wall, as was also Sigebert, king of the East Saxons. Diama, an Irish monk, was first bishop of all Mercia, its second, Ceolach, being Irish also, and also its fourth. Montalembert, in his _Moines d'Occident_, has given us the most delightful history that exists of the conversion of Anglo-Saxon England, a work combining the depth of a Christian philosopher with the sagacity of a statesman, and a dramatist's appreciation of character, while in it we miss nothing of that picturesque vividness and engaging simplicity which belong to our early chroniclers; thus conferring upon England a boon if possible greater than that bestowed upon Ireland in his lives of St. Columba, St. Columbanus and other saints. It is thus that he apportions the share which the Irish missionaries and the Roman had in that great enterprise.