When Perceval was whole, he departed from the castle of the Queen of the Golden Circlet, all of whose land was at his commandment. The Queen told him that she would keep the Golden Circlet until he should will otherwise, and in such sort he left it there, for he would not carry it with him, sith that he knew not whitherward he might turn. The history telleth us that he rode on until one day he came to the Castle of Copper. Within the castle were a number of folk that worshipped the bull of copper and believed not in any other God. The bull of copper was in the midst of the castle upon four columns of copper, and bellowed so loud at all hours of the day that it was heard for a league all round about, and there was an evil spirit within that gave answers concerning whatsoever any should ask of it. X. At the entrance to the gateway of the castle were two men made of copper by art of nicromancy, and they held two great mallets of iron, and they busied themselves striking the one after the other, and so strongly they struck that nought mortal is there in the world that might pass through amongst their blows but should be all to-crushed thereby. And on the other side was the castle so fast enclosed about that nought might enter thereinto. XI. Perceval beholdeth the fortress of the castle, and the entrance that was so perilous, whereof he marvelleth much. He passeth a bridge that was within the entry, and cometh nigh them that guard the gate. A Voice began to cry aloud above the gate that he might go forward safely, and that he need have no care for the men of copper that guarded the gate nor be affrighted of their blows, for no power had they to harm such a knight as was he. He comforteth himself much of that the Voice saith to him. He cometh anigh the serjeants of copper, and they cease to strike at once, and hold their iron mallets quite still. And he entereth into the castle, where he findeth within great plenty of folk that all were misbelievers and of feeble belief. He seeth the bull of copper in the midst of the castle right big and horrible, that was surrounded on all sides by folk that all did worship thereunto together round about. XII.