E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A famous old hag, quite bald behind. Sir Guyon seized her by the forelock and threw her to the ground. Still she railed and reviled, till Sir Guyon gagged her with an iron lock; she then began to use her hands, but Sir Guyon bound them behind her. (Spenser: Faërie Queene, book ii.)