BONIFACE V., pope from 619 to 625, did much for the christian izing of England. Bede mentions (Hist. Eccl.) that he wrote en couraging letters to Mellitus, archbishop of Canterbury, and Justus, bishop of Rochester, and quotes three letters—to Justus, to Eadwin, king of Northumbria, and to his wife Aethelberga. William of Malmesbury gives a letter to Justus of the year 625, in which Canterbury is constituted the metropolitan see of Brit ain for ever.