 It was essential to Henry that he did not also 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.