'Sir, I thank you from my heart,' said the knight, and bowed. Then wheeling his horse he dashed swiftly away.
At Camelot, on the day and hour appointed, the lists were set, and knights and nobles and the common people waited to see the trial by battle which should prove the innocence or guilt of King Anguish. King Arthur was not at Camelot, nor was Sir Lancelot, for both were at Joyous Gard, the castle of Sir Lancelot, which King Arthur had given to him by the sea in the Northern Marches. In their places, King Kador of Cornwall and King Uriens of Reged were judges at the trial.
Ere noon was marked by the gnomon of the dial set up before the judges, Sir Tristram and his squire Governale rode up the lists, and were met by King Anguish and his knights. When Sir Tristram saw the King of Ireland he got swiftly from his horse and ran towards him, and would have held his stirrup; but the king leapt lightly from his horse, and with bright looks each embraced and kissed the other.
'My good lord,' cried Tristram, 'gramercy of your goodness which ye showed me in your marches, and of your nobleness in calling me unto your aid, for it is great honour to me that ye ask this, and I will do all for you to the utmost of my strength.'
'Ah, worshipful knight,' said the king, 'ye are courteous and noble beyond all others to come to my aid when I am in such dire need.'
'Who is he that is appointed to fight with you or your champion?' asked Sir Tristram.
'He is of Sir Lancelot's blood,' replied the king, 'and I wot that he will be hard to overcome, for all those of King Ban's kin are passing good fighters beyond all others. It is Sir Blamor de Ganis, a great warrior.'
'Sir,' said Sir Tristram, 'for the great goodness that ye showed to me in Ireland and for your daughter's sake, La Belle Isoude, I will take the battle in hand for you. But ye must first swear that ye never caused or consented to the death of the knight of which you are charged, and if I avail in your battle I will crave a boon of you which you shall grant me.'
'I swear to Heaven,' replied the king, 'that I did neither cause nor consent to the death of the knight; and as to the boon that ye shall ask, I grant it you already.'
Then King Anguish departed to the judges and cried unto them the name of his champion, and all the knights of the Round Table that were there, and the common people, were all agog to see Sir Tristram. The fame of his fight with Sir Marhaus, and his renown as a harpist and a lover of hunting, were well known unto all; but never yet had he come to the court of King Arthur.