E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Mark (Sir).
A mythical king of Cornwall, Sir Tristram’s uncle. He lived at Tintag’el Castle, and married Is’olde the Fair, who was passionately enamoured of his nephew, Sir Tristram. The illicit loves of Isolde and Tristram were proverbial in the Middle Ages.
