Again Philip intervened, and again John promised redress. This time apparently Philip deemed it advisable to require security for the fulfilment of the promise. The security which he asked for, however, was more than John could reasonably be expected to give; it seems to have been nothing less than three of the most important castles in Normandy--those of Falaise, Arques, and “Andely,” that is, Château-Gaillard. In December John summoned Archbishop Hubert over from England, and sent him to “make his excuses” to the French king;[355] and Hubert so far succeeded that after Christmas John was able to venture into Aquitaine. Early in February 1202 he met the king of Navarre at Angoulême, and made with him a treaty of close offensive and defensive alliance.[356] It was arranged that John and Philip should hold a conference--seemingly on March 25--at Boutavant. John, it appears, kept, or at least was ready to keep, the appointment; but Philip either was or pretended to be afraid of venturing into Norman territory, and would not advance beyond Gouleton. Thither John came across the river to meet him.[357] No agreement was arrived at. Finally, Philip cited John to appear in Paris fifteen days after Easter,[358] at the court of his overlord the king of France, to stand to its judgement, to answer to his lord for his misdoings, and undergo the sentence of his peers. The citation was addressed to John as count of Anjou and Poitou and duke of Aquitaine;[359] the Norman duchy was not mentioned in it. This omission was clearly intentional; when John answered the citation by reminding Philip that he was duke of Normandy, and as such, in virtue of ancient agreement between the kings and the dukes, not bound to go to any meeting with the king of France save on the borders of their respective territories, Philip retorted that he had summoned not the duke of Normandy but the duke of Aquitaine, and that his rights over the latter were not to be annulled by the accidental union of the two dignities in one person.[360] John then promised that he would appear before the court in Paris on the appointed day, and give up to Philip two small castles, Thillier and Boutavant, as security for his submitting to its decision. April 28 passed, and both these promises remained unfulfilled.[361] One English writer asserts that thereupon “the assembled court of the king of France adjudged the king of England to be deprived of all his land which he and his forefathers had hitherto held of the king of France”;[362] but there is reason to think that this statement is erroneous, and derived from a false report put forth by Philip Augustus for political purposes two or three years later.[363] It is certain that after the date of this alleged sentence, negotiations still went on; “great and excellent mediators” endeavoured to arrange a pacification;[364] and Philip himself, according to his own account, had another interview with John, at which he used all