While Château Gaillard was besieged, he sent his forces against Philip's troops but they failed to remove them. Later he devised a plan for a relief effort to the castle which also failed. He wrote a letter to de Lascy about a new relief effort, and ordered him to hid all valuable items in a hidden chamber and destroy the key.
He died in 1216.
His concessions to Philip Augustus of France earned him the nickname "Lackland".