poisonous fires and hot liquids , arrows and great rocks , was he prepared to shoot down on any who would assail those gleaming walls ; and then he abode as well content as might be , but tuor 's heart was heavier than the king 's , for now the words of ulmo came ever to his mind , and their purport and gravity he understood more deeply than of old ; nor did he find any great comfort in idril , for her heart boded more darkly even than his own .