Knox returned to England, where he joined Archbishop Crammer and Protector Somerset in their efforts to reform the church under Edward VI. He was active in the English Reformation for five years (1549-1554). During those years he demonstrated his ability as a rugged political fighter. His sermons attacked the Mass as idolatrous, and he was summoned to answer for his views before the Council of the North at Newcastle in 1550. At the Council he vindicated the Puritan position that "all
