The Magus, Book I: The First Principles of Natural Magic: Book the First: Chapter VII: Of The Occult Virtues Of Things...

IT is expedient for us to know that there are some things which retain virtue only while they are living, others even after death. So in the cholic, if a live duck be applied to the belly, it takes away the pain, and the duck dies. If you take the heart out of any animal, and, while it is warm, bind it to one that has a quartan fever, it drives it away. So if any one shall swallow the heart of a lapwing, swallow, weasel, or a mole, while it is yet living and warm with natural heat, it improves his intellect, and helps him to remember, understand, and foretel things to come. Hence this general rule,--that whatever