 According to the canons of the Council of Lambeth (1281), every parish priest was to explain these seven to his parishioners four times a year.In 1357, Archbishop John Thoresby issued a similar set of instructions to the clergy of the Province of York, commissioning this time a vernacular version (the so-called "Lay-Folks' Catechism") which became the religious best seller of the fourteenth and fifteenth centuries.A similar set of lists was popularized through the extremely influential contemplative manual by Edmund of Abingdon, the so-called "St. Edmund's Mirror," widely distributed in Latin, French, and English versions.