Christianity first came into Britain in Roman times, and some of the Britons were converted. After the Romans quitted the country, King Arthur was the leader of the Christian Britons, and he is said to have fought with the pagan Britons, the pagan Picts, the pagan Saxons, who had begun their invasions, and the disorderly soldiers of various races, probably pagans whom the Romans left behind along the wall. In due time the fight developed into a struggle between Christian Britons and pagan Saxons, and then the Saxons themselves began to accept the new religion. Oswald, a Northumbrian prince, had in a time of peril hidden in the island of Iona, to where the great Irishman Columba had come from Ireland as a missionary. When Oswald returned to power he summoned to his kingdom Aidan, a high-minded Christian teacher, whom he made first bishop of Lindisfarne (Holy Island). Aidan being a Celt, had to do his work through interpreters, but he did it well, and laid the foundations of Christianity and learning in Northumbria. Cuthbert was another famous missionary. Rising from shepherd-boy to bishop, he impressed both king and peasant by the dignified simplicity and sincerity of his life. His place of meditation was a sea-girt rock by Lindisfarne, lonely and picturesque, and still called after his name. A curious fossil, with the mark of a cross, is plentiful there, and goes by the name of St Cuthbert’s beads. Other famous teachers were Wilfrid of York, who founded the churches of Hexham and Ripon; Boisil, who founded Melrose, and Biscop, who founded Jarrow. But perhaps the most celebrated of all was Bede, the "Venerable Bede," who lived at Jarrow and wrote forty-five learned books on all subjects, including music, astronomy, and medicine. All the scholars in England flocked to hear his teachings, and he was justly called "the father of English learning." He it was who first introduced into England the art of making glass. His last work was to translate the Gospel of St John into Northumbrian English. This was in the year 735. Being too ill to hold a pen, he dictated to his favourite pupil. "Write quickly," he said, for he felt that he was dying. "It is finished," answered the lad, and the old man’s heart was satisfied. In a faint, brave voice he chanted the _Gloria_, and so died singing.