formula. Ut Fiat Homo Lupinus it was entitled, which purported to give the secret words and ritual necessary to achieve the transformation from man to beast.

At last, the opportunity had arrived Ambrose's way to achieve his long-desired revenge on Brother Lorenzo!

Twenty-four hours had passed since the momentous discovery. The moment was at hand. Night again had settled upon the Spanish cloisters, the last bell had tolled; and all the good and hardy men were supposed to be at sound sleep on their rough iron cots. But in Brother Ambrose's chilly cell, a small candle burned—casting sickly light that produced huge flickering shadows against the whitewashed walls.

Brother Ambrose held the treasured piece of manuscript between his hands. It was difficult to make out the faded Latin; the writing was cramped and crude, and Ambrose was no scholar to boot. But like all persons of his times, he was quite well-aware of the existence of werewolves, werefoxes, and other such monsters; and he held no doubt but what the spell would work.

It was the scheming brother's plan to creep in the stealth of night down the corridor to the barred oak door of Lorenzo's own simple cell. There, he would knock; lightly enough to disturb no other sleepers, yet loud enough that the rapping would summon Brother Lorenzo from whatever wicked dreams might be festering in his own sleeping mind.

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 

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