As Fray Lorenzo's naked footsteps were heard pattering across the bare floor, Ambrose would drink the bat's blood he had collected, sniff the wolfbane he had ground to ash, and pronounce the obscure Celtic words that would alter the very atoms of his flesh, transforming them into an obscene travesty of life. Brother Lorenzo, when he opened the door, would be met not by a fellow human being, but by a snarling fanged wolf that would hurl its hairy bulk at the drowsy monk's own throat. The next day, the entire monastery would be awakened, of course, by shouts of the news that foul murder had been discovered. But no amount of detection would ever manifest the bestial murderer. Brother Ambrose would hug to his soul the secret of his crime until the day of his shriving. At length, the hour had grown so late that it was certain even the Prior himself must have long since retired. Brother Ambrose made ready to carry out his deed. He rose from his cot, removed the coarse brown robe that normally he wore to bed as well as in his daily rounds so that his long-unwashed body stood naked. There must be no chance for tell-tale blood to stain his clothes, when his fierce talons and wolfish teeth tore and rended at human flesh. Carrying his precious piece of scroll, he departed from his cell and groped his way down the stone corridor until the light improved enough for him to see his way. Luckily, a patch of moonlight illuminated the very space in front of the accursed Brother Lorenzo's door. What fortune! Brother Ambrose halted and stared at the door as though his eyes could see through it, at the sleeping form within. He sucked in a deep breath. His palms were sweaty; his heartbeat rapid. For a moment, he was almost ready to back out. Then suddenly, the memory of all the hundreds of grudges he bore against Lorenzo surged through him. Hatred built up a massive reservoir, that broke out over his crumbling conscience and flooded his body with anger and wild resentment. His teeth gritted. What had he been thinking of--to retreat now, with revenge so nearly at hand! He rapped. A moment later, he heard a creaking sound like Brother Lorenzo slipping out of bed. Trembling, he lifted the phial of bat's blood, drank it down. It tasted salty. He chewed on the wolfbane powder until it mixed with the saliva of his mouth, then he swallowed. Holding the ancient scroll-segment before him, he began to repeat the badly-written incantation: _Ut fiat homo lupinus, pulvis arnicae facenda est et dum...._ A thousand jolts assailed his body, as if he had been struck by all the lightnings in heaven. Then, came a rushing paralysis, a distortion of time and space, a dread feeling of disintegration and death ...