to write a significant anti-Judaic treatise Against the Perfidy of Jews around 1190.

William de Blois, as Bishop of Worcester, imposed particularly strict rules on Jews within the diocese in 1219. As elsewhere in England, Jews were officially compelled to wear square white badges, supposedly representing tabulae. In most places, this requirement was relinquished as long as fines were paid. In addition to enforcing the church laws on wearing badges, Blois tried to impose