The bull bellowed so passing loud that right uneath was it to hear aught else within the castle besides. Perceval was therewithin, but none was there that spake unto him, for, so intent were they upon adoring the bull that, and any had been minded to slay them what time they were yet worshipping the same, they would have allowed him so to do, and would have thought that they were saved thereby; and save this had they none other believe in the world. It was not of custom within there to be armed, for the entrance of the fortress was so strong that none might enter but by their will and commandment, save it were the pleasure of our Lord God. And the devil that had deceived them, and in whom they believed, gave them such great abundance therewithin of everything they could desire, that nought in the world was there whereof they lacked. When he perceived that they held no discourse with him, he draweth himself on one side by a great hall, and so called them around him. The more part came thither, but some of them came not. The Voice warneth him that he make them all pass through the entrance of the gateway there where the men with the iron mallets are, for there may he well prove which of them are willing to believe in God and which not. The Good Knight draweth his sword and surroundeth them all and maketh them all go in common before him, would they or nould they. And they that would not go willingly and kindly might be sure that they should receive their death. He made them pass through the entrance there where the serjeants of copper were striking great blows with their iron mallets. Of one thousand five hundred that there were, scarce but thirteen were not all slain and brained of the iron mallets. But the thirteen had firmly bound their belief in Our Lord, wherefore the serjeants took no heed of them. XIII. The evil spirit that was in the bull of copper issued forth thereof as it had been lightning from heaven, and the bull of copper melted all in a heap so as that nought remained in that place thereof. Then the thirteen that remained sent for a hermit of the forest and so made themselves be held up and baptized. After that, they took the bodies of the misbelievers and made cast them into a water that is called the River of Hell. This water runneth into the sea, so say many that have seen it, and there where it spendeth itself in the sea is it most foul and most horrible, so that scarce may ship pass that is not wrecked. XIV.