 Complete the following phrase:  King Henry continued to support the young duke, but in late 1046 opponents of William came together in a rebellion centred in lower Normandy, led by Guy of Burgundy with support from Nigel, Viscount of the Cotentin, and Ranulf, Viscount of the Bessin. According to stories that may have legendary elements, an attempt was made to seize William at Valognes, but he escaped under cover of darkness, seeking refuge with King Henry. In early 1047 Henry and William returned to Normandy and were victorious at the 