'Depart!' he cried harshly, 'and tell your master that it is idle for him to send to mine uncle. Tell him from me, Sir Gawaine, that by the vow of my knighthood, I will never leave this land till I or he be slain. Now go!'
When this message was told to Sir Lancelot, the tears stood in his eyes and he went apart, and for that day the knights his comrades held their counsel. But they resolved that next day they would prevail upon Sir Lancelot to issue forth and give battle.
But in the morning, when they looked from the walls of the castle, they saw that Sir Gawaine had crept up in the dawn, and now was the place besieged. Thereupon there was fierce fighting, for Sir Gawaine caused ladders to be reared, and his knights strove to climb over the Wall, but were mightily beaten back by Sir Lancelot's party.
Then the attackers drew off for a space, and Sir Gawaine, well armed, came before the chief gate, upon a stout steed. He shook his lance at the men over the gate, and cried:
'Where art thou, false traitor, Sir Lancelot? Why dost thou hide thyself within holes and walls like a coward? Look out now, thou timid soul, for when I may get at thee I will revenge upon thy evil body the death of my brothers twain.'
These shameful words were heard by Sir Lancelot, and all his knights and kin that stood about him, and they said:
'Sir Lancelot, now ye must be done with thy courtesy and go forth and beat back those evil words upon his foul mouth.'
'It is even so,' said Sir Lancelot; 'but sorry I am and heavy of spirit thus to fight with him, who hath been my dear brother-in-arms so long, and whose brothers I did unwittingly slay. And much evil shall come of this.'
Then he commanded his strongest horse to be saddled, and bade his armour to be dressed upon him, and when he was fully armed he stood at the top of the gate and cried upon the king.
'My lord Arthur,' he said, 'you that made me knight, wit you well that I am right heavy that ever ye do pursue me thus; but now that Sir Gawaine hath used villainous words about me, I must needs defend myself.'