The "Book of Advertisements", which Parker published in 1566 to check the anti-vestments faction, had to appear without specific royal sanction; and the "Reformatio legum ecclesiasticarum", which John Foxe published with Parker's approval, received neither royal, parliamentary or synodical authorisation. Parliament even contested the claim of the bishops to determine matters of faith. "Surely", said Parker to Peter Wentworth, "you will refer yourselves wholly to us therein." "No, by the faith I bear to God", retorted Wentworth, "we will pass nothing before we understand what it is; for that were but to make you popes. Make you popes who list, for we will make you none."