Bracton's On the Laws and Customs of England Attributed to Bracton but perhaps the work of his mentor William of Raley, this great work consolidates the enormous body of often conflicting Roman and common law. Copiled mostly in the 1220s and 30s, it was still being revised when the Second Barons' War broke out in 1258, pitting Edward I against a rebellion of barons led by Simon de Monfort.