Although Bucer assisted in the development of the English Reformation, he was still quite concerned about the speed of its progress. Both Bucer and Fagius had noticed that the 1549 Prayer Book was not a remarkable step forward, although Cranmer assured Bucer that it was only a first step and that its initial form was only temporary. By late 1550, Bucer was becoming disillusioned. Cranmer made sure that he did not feel alienated and kept in close touch with him. This attention paid off during the vestments controversy. This incident was initiated by John Hooper, a follower of Heinrich Bullinger who had recently returned from Zürich. Hooper was unhappy with Cranmer's Prayer Book and Ordinal and he particularly objected to the use of ceremonies and vestments. When the Privy Council selected him to be the Bishop of Gloucester on 15 May 1550, he laid down conditions that he would not wear the required vestments. He found an ally among the Continental reformers in Jan Łaski who had become a leader of the Stranger church in London, a designated place of worship for Continental Protestant refugees. His church's forms and practices had taken reforms much further than Cranmer would have liked. Bucer and Peter Martyr, while they sympathised with Hooper's position, supported Cranmer's arguments of timing and authority. Cranmer and Ridley stood their ground. This led to Hooper's imprisonment and he eventually gave in. He was consecrated on 8 March 1551 according to the Ordinal and he preached before the king in his episcopal garments. Cranmer's vision of reform through careful steps under the authority of the government was maintained.