THE ELF SALVE
Make a salve against the race of elves and against spirits walking about at night and against women with whom the devil has sexual intercourse.
Take the female hop plant, wormwood, bishop's wort, lupine, vervain, henbane, harewort, viper's bugloss, sprouts of heathberry, leek, garlic, seeds of cleavers, cockle and fennel. Put the herbs in a vessel, set them under the alter, sing masses over them, boil them in butter, and in sheep's fat, add a good quantity of holy salt, strain them through a cloth, throw the herbs into running water. If a man has any evil temptations, or is troubled by elves or nocturnal spirits, smear his face with this salve, and put something on his eyes and where his body may be painful. And smoke him with incense and frequently make the sign of the cross on him. His condition will soon be better.
from 'The Leechbook'