Sometime before the middle of the twelfth century, an anonymous English writer composed the Leges Edwardi, a treatise purporting to contain the laws that had been in force under the Anglo-Saxon King Edward the Confessor (1042-1066), cousin of William the Conqueror. The laws were said to have been spoken to William shortly after the Conquest by "English nobles who were wise men and learned in their law," recounting "the rules of their laws and customs" for the invading Norman king. When they had finished, the king wondered whether it might not be better for all of them to live under the law of...