Sir Launcelot offers to fight Sir Mellegrans in half-armor.
Then Sir Mellegrans said to those who were with him: "Now I will go down and do battle with this knight, for never will I have a better chance of overcoming him than this." Therewith he turned to that messenger, and he said: "Go! Hasten back to yonder knight, and tell him that I will do battle with him upon those conditions he offers, to wit: that he shall unarm his left side, and that he shall lay aside his shield and his helm. And tell him that by the time he hath made him ready in that wise, I will be down to give him what satisfaction I am able."
So the messenger departed upon that command, and Sir Mellegrans departed to arm himself for battle.
Then, after the messenger had delivered the message that Sir Mellegrans had given him, Sir Launcelot laid aside his shield and his helm as he had agreed to do, and he removed his armor from his left side so that he was altogether unarmed upon that side.
After a while Sir Mellegrans appeared, clad all in armor from top to toe, and baring himself with great confidence, for he felt well assured of victory in that encounter. Thus he came very proudly nigh to where Sir Launcelot was, and he said: "Here am I, Sir Knight, come to do you service since you will have it so."
Sir Launcelot said: "I am ready to meet thee thus or in any other way, so that I may come at thee at all."
After that each knight dressed himself for combat, and all those who were in the castle gathered at the windows and the galleries above, and looked down upon the two knights.
Then they two came slowly together, and when they were pretty nigh to one another Sir Launcelot offered his left side so as to allow Sir Mellegrans to strike at him. And when Sir Mellegrans perceived this chance, he straightway lashed a great blow at Sir Launcelot's unarmed side with all his might and main, and with full intent to put an end to the battle with that one blow.
But Sir Launcelot was well prepared for that stroke, wherefore he very dexterously and quickly turned himself to one side so that he received the blow upon the side which was armed, and at the same time he put aside a part of the blow with his sword. So that blow came to naught.
Sir Launcelot slayeth Sir Mellegrans.