Henry began to formally look for a new husband for Matilda in early 1127 and received various offers from princes within the Empire. His preference was to use Matilda's marriage to secure the southern borders of Normandy by marrying her to Geoffrey, the eldest son of Count Fulk V of Anjou. Henry's control of Normandy had faced numerous challenges since he had conquered it in 1106, and the latest threat came from his nephew William Clito, the new count of Flanders, who enjoyed the support of the French king. It was essential to Henry that he not face a threat from the south as well as the east of Normandy. William Adelin had married Fulk's daughter Matilda, which would have cemented an alliance between Henry and Anjou, but the "White Ship" disaster put an end to this. Henry and Fulk argued over the fate of the marriage dowry, and this had encouraged Fulk to turn to support William Clito instead. Henry's solution was now to negotiate the marriage of Matilda to Geoffrey, recreating the former alliance.