Recipes from Albertus Magnus.
"If thou wylt see that other men cannot see: Take the gall of a male cat, and the fat of a hen all whyte, and mixe them together, and anoint thy eyes, and thou shalt see it that others cannot see.
"If the hart, eye or brayne of a lapwyng or blacke plover be hanged upon a man's neck, it is profitable agaynste forgetfulnesse, and sharpeth man's understanding."—Black letter copy—very old.