E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Hereward the Wake, in the time of William the Conqueror. The Camp of Refuge was established in the Isle of Ely, and the Earl of Morcar joined it in 1071. It was blockaded for three months by William, and Hereward (3 syl.) with some of his followers escaped.