Matilda's return to her father, and Henry's evident intention to make her the heir of his dominions, of Normandy as well as of England, seem to have moved King Louis to some immediate action in opposition. The separation of the duchy from the kingdom, so important for the interests of the Capetian house, could not be hoped for unless this plan was defeated. The natural policy of opposition was the support of William Clito. At a great council of his kingdom, meeting at the same time with Henry's court in which Matilda's heirship was recognized, the French king bespoke the sympathy and support of his barons for "William of Normandy." The response was favourable, and Louis made him a grant of the French Vexin, a point of observation and of easy approach to Normandy. At the same time, a wife was given William in the person of Jeanne, half sister of Louis's queen, and daughter of the Marquis of Montferrat. A few weeks later William advanced with an armed force to Gisors, and made formal claim to Normandy. It was hardly these events, though they were equivalent to a formal notification of the future policy of the king of France, which brought Henry to a decision as to his daughter's marriage. On March 2, the Count of Flanders, Charles the Good, was foully murdered in the Church of St. Donatian at Bruges. He was without children or near relatives, and several claimants for the vacant countship at once appeared. Even Henry I is said to have presented his claim, which he would derive from his mother, but he seems never seriously to have prosecuted it. Louis, on the contrary, gave his whole support to the claim of William Clito, and succeeded with little difficulty in getting him recognized by most of the barons and towns as count. This was a new and most serious danger to Henry's plans, and he began at once to stir up troubles for the new count among his vassals, by the support of rival claimants, and in alliance with neighbouring princes. But the situation demanded measures of direct defence, and Henry was led to take the decisive step, so eventful for all the future history of England, of marrying Matilda a second time. Immediately after Whitsuntide of 1127, Matilda was sent over to Normandy, attended by Robert of Gloucester and Brian Fitz Count, and at Rouen was formally betrothed by the archbishop of that city to Geoffrey, son of Fulk of Anjou. The marriage did not take place till two years later.