19. The Reformation in Scotland.--All things considered, the Reformation in Scotland--that is the overthrow of the authority of the pope--was accomplished with as little trouble as it was in England; and accompanied by less injustice to Catholics. In Scotland, as in England, the doctrines of Wycliffe had many silent adherents, and such was the frame of the popular mind that only the leadership of bold men was needed to make a successful revolt against the authority of the pope. That leadership was found in John Knox.[46] Knox was thirty-eight years of age when he openly declared himself a Protestant, and began his work of reform. About three years later Cardinal Beaton, a proud, arrogant man, and of course the head of the Catholic church in Scotland, was assassinated. His castle--St. Andrews--was taken possession of by the band of nobles and others who had murdered him, and it became for a time the stronghold of Protestantism. To this place Knox repaired, and there in the parish church of St. Andrews, first became famous as a preacher. In a short time, however, the fortress was surrendered, and Knox was sent to the French galleys a prisoner. After two years he was set at liberty, and allowed to depart for England, where he lived for years, on terms of intimacy with Cranmer and other English reformers. {262} On the accession of Queen Mary,[47] Knox retired to Germany and Switzerland, residing chiefly in the latter place, where he learned and became attached to both the doctrines and form of church government taught by Calvin.