Stories from Le Morte D'Arthur and the Mabinogion
Chapter 3
XI. OF THE BIRTH OF ST. TRISTRAM XII. HOW TRISTRAM FOUGHT WITH SIR MARHAUS OF IRELAND XIII. THE FAIR ISOLT XIV. HOW KING MARK SENT SIR TRISTRAM TO FETCH HIM A WIFE XV. HOW SIR TRISTRAM AND THE FAIR ISOLT DRANK OF THE MAGIC POTION XVI. OF THE END OF SIR TRISTRAM