When the treaty between Henry and Louis was made, in September, 1217, both parties, as we have seen, bound themselves by oath to certain conditions which are not mentioned in the copies of that treaty which have come down to us. Henry swore to maintain inviolate those liberties of the English barons and people which had served as one of the pretexts for Louis’s invasion; Louis swore that he “would do his utmost to induce his father to restore the English King to all his rights in the parts beyond the sea.”[857] Naturally the English Council construed this as binding Louis, if the restoration were not effected in his father’s lifetime, to make it himself as soon as it was in his own power. They at once took the matter up with a high hand. Pandulf, now Bishop of Norwich,[858] urged the Pope to forbid that any one should crown Louis until the promised restitution to Henry was made.[859] The Archbishop of Canterbury and the Bishops of London and Salisbury undertook the double duty of presenting to Louis himself a formal demand for the fulfilment of his promise, and to the Archbishop of Reims a protest against his coronation if the demand were not at once satisfied.[860] Letters patent had already been issued in the King’s name to the barons, knights, and good men of Normandy, calling on them to return to their allegiance, “since the opportunity is now at hand,” and promising, if they did so, restitution to each man, according to his rights, of the lands in England which they lost when the King’s father lost Normandy, and such further rewards as their service should deserve.[861] Preparations were made for collecting a fleet; all ships coming into English ports were ordered to be seized, emptied of their contents (which were to be stored up safely for return to the owners), and sent to Portsmouth for the King’s service.[862] The Forest districts of the southern counties were bidden to send to Porchester large supplies of “hurdles for the ships,”[863] and on 9th August the barons of the Cinque Ports were summoned to come to Portsmouth “with the whole service which they owe to the King, and with their ships, with the first favourable wind, to go with the King in his service.”[864]