Impatient with the slow progress though the Scots garrison holding the castle were ready to sue for surrender at this point commissioned a more massive trebuchet from master architecture James of Saint George to be christened the Warwolf. Edward refused the request of William Oliphant, constable and commander, until he got to test his Warwolf. Once the castle was taken, all the landed-gentry excepting William Wallace pledged their fealty to King Edward.