Normanniae in curia laïcali) authored between 1235 and 1245. The Channel Islands remained part of the Duchy of Normandy until 1204 when King Philip II Augustus of France conquered the duchy from King John of England. The islands remained in the personal possession of the King of England and were described as being a Peculiar of the Crown. They retained the Norman customary law and developed it in parallel with continental Normandy and France, albeit with different evolutions. See also Clameur de haro References External links An Introduction to the History of Guernsey Law Jersey Legal System and Constitutional Law (Institute of Law, Jersey, 2011) Normandy Legal history of France Customary legal systems Duchy of Normandy