How Sir Launcelot was wroth with the letter that he received from King Mark, and of Dinadan which made a lay of King Mark.
When King Arthur understood the letter, he mused of many things, and thought on his sister’s words, Queen Morgan le Fay, that she had said betwixt Queen Guenever and Sir Launcelot. And in this thought he studied a great while. Then he bethought him again how his sister was his own enemy, and that she hated the queen and Sir Launcelot, and so he put all that out of his thought. Then King Arthur read the letter again, and the latter clause said that King Mark took Sir Tristram for his mortal enemy; wherefore he put Arthur out of doubt he would be revenged of Sir Tristram. Then was King Arthur wroth with King Mark. And when Queen Guenever read her letter and understood it, she was wroth out of measure, for the letter spake shame by her and by Sir Launcelot. And so privily she sent the letter unto Sir Launcelot. And when he wist the intent of the letter he was so wroth that he laid him down on his bed to sleep, whereof Sir Dinadan was ware, for it was his manner to be privy with all good knights. And as Sir Launcelot slept he stole the letter out of his hand, and read it word by wo............