The death of young Henry led at once to annoying questions raised by Philip of France. His sister Margaret was now a widow without children, and he had some right to demand that the lands which had been ceded by France to Normandy as her marriage portion should be restored. These were the Norman Vexin and the important frontier fortress of Gisors. In the troublous times of 1151 Count Geoffrey might have felt justified in surrendering so important a part of Norman territory and defences to the king of France in order to secure the possession of the rest to his son, but times were now changed for that son, and he could not consent to open up the road into the heart of Normandy to his possible enemies. He replied to Philip that the cession of the Vexin had been final and that there could be no question of its return. Philip was not easily satisfied, and there was much negotiation before a treaty on the subject was finally made at the beginning of December, 1183. At a conference near Gisors Henry did homage to Philip for all his French possessions, a liberal pension was accepted for Margaret in lieu of her dower lands, and the king of France recognized the permanence of the cession to Normandy on the condition that Gisors should go to one of the sons of Henry on his marriage with Adela which was once more promised. This marriage in the end never took place, but the Vexin remained a Norman possession. The year 1184 was a repetition in a series of minor details, family quarrels, foreign negotiations, problems of government, and acts of legislation, of many earlier years of the life of Henry. After Christmas, 1183, angered apparently by a new refusal of Richard to give up Aquitaine to John, or to allow any provision to be made for him in the duchy, Henry gave John an army and permission to make war on his brother to force from him what he could. Geoffrey joined in to aid John, or for his own satisfaction, and together they laid waste parts of Richard's lands. He replied in kind with an invasion of Britanny, and finally Henry had to interfere and order all his sons over to England that he might reconcile them. In the spring of the year he found it necessary to try to make peace again between the king of France and the Count of Flanders. The agreement which he had arranged in 1182 had not really settled the difficulties that had arisen. The question now chiefly concerned the lands of Vermandois, Amiens, and Valois, the inheritance which the Countess of Flanders had brought to her husband. She had died just before the conclusion of the peace in 1182, without heirs, and it had been then agreed that the Count should retain possession of the lands during his life, recognizing certain rights of the king of France. Now he had contracted a second marriage in the evident hope of passing on his claims to children of his own. Philip's declaration that this marriage should make no difference in the disposition of these lands which were to prove