The discovery that Jeremy Taylor, the ‘Anglican’ divine, wrote much of the text of the Rutland Petition in Defence of Episcopacy in November 1641, and included many of the arguments that appeared in his ‘Of the sacred order and offices of episcopacy’, published in 1642, throws fresh light on the political and ecclesiastical implications of royalist petitioning. These petitions have sometimes been viewed as expressions of support for ‘prayer book Protestantism’. But, in line with other recent work, this article argues that they drew support from a very broad spectrum of religious opinion, which ranged from moderate Puritan supporters of further reform to avant-garde conformists. Each had their own agenda; but they could be mobilised behind the petitions because of the widespread fear of radical sectarian challenges to the established Church in late 1641.