From England, after the death of Edward, Knox proceeded to the continent, traveling for a time from place to place in some uncertainty. In Sept. 1554, while living at Geneva, he accepted in accordance with Calvin's counsel a call to the English Church at Frankfurt. Here controversies in connection with vestments, ceremonies, and the use of the English prayer-book met him He later returned to Geneva, where he was invited to become minister of the refugee English congregation. In August of 1555, Knox set out for Scotland, where he remained for nine months preaching Evangelical doctrine in various parts of the country, and persuading those who favored the Reformation to cease from attendance at mass, and to join with himself in the celebration of the Lord's Supper according to a Reformed ritual.