How for the despite of Sir Tristram King Mark came with two knights into England, and how he slew one of the knights.
Then King Mark had great despite of the renown of Sir Tristram, and then he chased him out of Cornwall: yet was he nephew unto King Mark, but he had great suspicion unto Sir Tristram because of his queen, La Beale Isoud; for him seemed that there was too much love between them both. So when Sir Tristram departed out of Cornwall into England King Mark heard of the great prowess that Sir Tristram did there, the which grieved him sore. So he sent on his part men to espy what deeds he did. And the queen sent privily on her part spies to know what deeds he had done, for great love was between them twain. So when the messengers were come home they told the truth as they had heard, that he passed all other knights but if it were Sir Launcelot. Then King Mark was right heavy of these tidings, and as glad was La Beale Isoud. Then in great despite he took with him two good knights and two squires, and disguised himself, and took his way into England, to the intent for to slay Sir Tristram. And one of these two knights hight Bersules, and the other knight was called Amant. So as they rode King Mark asked a knight that he met, where he should find King Arthur. He said: At Camelot. Also he asked that knight after Sir Tristram, whether he heard of him in the court of King Arthur. Wit you well, said that knight, ye shall find Sir Tristram there for a man of as great worship as is now living; for through his prowess he won the tournament of the Castle of Maidens that standeth by the Hard Rock. And sithen he hath won with his own hands thirty knights that were men of great honour. And the last battle that ever he did he fought with Sir Launcelot; and that was a marvellous battle. And not by force Sir Launcelot brought Sir Tristram to the court, and of him King Arthur made passing great joy, and so made him Knight of the Table Round; and his seat was where the good knight’s, Sir Marhaus, seat was. Then was King Mark passing sorry when he heard of the honour of Sir Tristram; and so they departed.
Then said King Mark unto his two knights: Now will I tell you my counsel: ye are the men that I trust most to alive, and I will that ye wit my coming hither is to this intent, for to destroy Sir Tristram by wiles or by treason; and it shall be hard if ever he escape our hands. Alas, said Sir Bersules, what mean you? for ye be set in such a way ye are disposed shamefully; for Sir Tristram is the knight of most worship that we know living, and therefore I warn you plainly I will never consent to do him to the death; and therefore I will yield my service, and forsake you. When King Mark heard him say so, suddenly he drew his sword and said: Ah, traitor; and smote Sir Bersules on the head, that the sword went to his teeth. When Amant, the knight, saw him do that villainous deed, and his squires, they said it was foul done, and mischievously: Wherefore we will do thee no more service, and wit ye well, we will appeach thee of treason afore Arthur. Then was King Mark wonderly wroth and would have slain Amant; but he and the two squires held them together, and set nought by his malice. When King Mark saw he might not be revenged on them, he said thus unto the knight, Amant: Wit thou well, an thou appeach me of treason I shall thereof defend me afore King Arthur; but I require thee that thou tell not my name, that I am King Mark, whatsomever come of me. As for that, said Sir Amant, I will not discover your name; and so they departed, and Amant and his fellows took the body of Bersules and buried it.