"On occasion monasteries tried to secure their possession by freighting their precious manuscripts with curses. "For him that stealeth, or borroweth and returneth not, this book from its owner," one of these curses runs, let it change into a serpent in his hand and rend him. Let him be struck with palsy, and all his members blasted. Let him languish in pain crying aloud for mercy, and let there be no surcease to his agony till he sing in dissolution. Let bookworms gnaw his entrails in token of the Worm that dieth not, and when at last he goeth to his final punishment, let the flames of Hell consume him forever. Even a worldly skeptic, with a strong craving for what he had in his hands, might have hesitated before slipping such a book into his cloak."