"Fevyr Fenne be prankish, sharpe of wit and pronne also to showe of distemper. Most often will they be found out amoung the mosse of the quagmyre. If thou hast been bitten, soone will that parte of thy body swell with rott, and so decrepit be. If thou by word or action so soothe or make confidence of this beaste, it shall remain devoted to thee for a tyme and this will not see the change of fourteen years. Bewarre such a friend."
- from the Bestarium Diabolus by Marcus of Gramercy, 12th Century