"Sir knight," replied the brothers, "we are weary, and will do thy wish without encountering thee; but by whom shall we tell the king that we were sent?"
"By the knight that followeth the quest of the white hart," said Sir Gawain. "And now tell me your names, and let us part."
"Sorlous and Brian of the Forest," they replied; and so they went their way to the king's court.
Then Sir Gawain, still following his quest by the distant baying of the hounds, came to a great river, and saw the hart swimming over and near to the further bank. And as he was about to plunge in and swim after, he saw a knight upon the other side, who cried, "Come not over here, Sir knight, after that hart, save thou wilt joust with me."
"I will not fail for that," said Sir Gawain; and swam his horse across the stream.
Anon they got their spears, and ran against each other fiercely; and Sir Gawain smote the stranger off his horse, and turning, bade him yield.
"Nay," replied he, "not so; for though ye have the better of me on horseback, I pray thee, valiant knight, alight, and let us match together with our swords on foot."
"What is thy name?" quoth Gawain.
"Allardin of the Isles," replied the stranger.
Then they fell on each other; but soon Sir Gawain struck him through the helm, so deeply and so hard, that all his brains were scattered, and Sir Allardin fell dead. "Ah," said Gaheris, "that was a mighty stroke for a young knight!"