[Sidenote:  King Mark takes hatred to Sir Tristram] All this King Mark overheard, and the words that they said were like a very bitter poison in his heart.  For their words entered into his soul and abided there, and thereupon at that same hour all his love for Tristram was turned into hate.  Thus it befell that, after that day, King Mark ever pondered and pondered upon that which he had heard, and the longer he pondered it, the more bitter did his life become to him, and the more he hated Sir Tristram.  So it came to pass that whenever he was with Sir Tristram and looked upon him, he would say in his heart:  “So they say that you are a better knight than I?  Would God you were dead or away from this place, for I believe that some day you will be my undoing!” Yea; there were times when he would look upon Sir Tristram in that wise and whisper to himself:  “Would God would send a blight upon thee, so that thou wouldst wither away!”

But always the King dissembled this hatred for Sir Tristram, so that no one suspected him thereof; least of all did Sir Tristram suspect how changed was the heart of the King toward him.

Now one day Sir Tristram was playing upon his harp and singing before King Mark, and the King sat brooding upon these things as he gazed at Tristram.  And Sir Tristram, as he ofttimes did nowadays, sang of the Lady Belle Isoult, and of how her face was like to a rose for fairness, and of how her soul was like to a nightingale in that it uplifted the spirit of whosoever was near her even though the darkness of sorrow as of night might envelop him.  And whilst Sir Tristram sang thus, King Mark listened to him, and as he listened a thought entered his heart and therewith he smiled.  So when Sir Tristram had ended his song of the Belle Isoult, King Mark said:  “Fair nephew, I would that you would undertake a quest for me.”  Sir Tristram said, “What quest is that, Lord?” “Nay,” said King Mark, “I will not tell you what quest it is unless you will promise me upon your knighthood to undertake it upon my behalf.”  Then Sir Tristram suspected no evil, wherefore he smiled and said:  “Dear Lord, if the quest is a thing that it is in my power to undertake, I will undertake it upon your asking, and unto that I pledge my knighthood.”  King Mark said, “It is a quest that you may undertake.”  Sir Tristram said, “Then I will undertake it, if you will tell me what it is.”

[Sidenote:  King Mark betrays Sir Tristram to a promise] King Mark said:  “I have listened to your singing for this long while concerning the Lady Belle Isoult.  So the quest I would have you undertake is this:  that you go to Ireland, and bring thence the Lady Belle Isoult to be my Queen.  For because of your songs and ballads I have come to love her so greatly that I believe that I shall have no happiness in life until I have her for my Queen.  So now, since you have pledged me your word upon your knighthood to do my bidding in this case, such is the quest that I would send you upon.”  And therewith he smiled upon Sir Tristram very strangely.