This was only temporary relief, however, for in the combat some of the best remaining knights were slain; among them were Sir Gareth and Sir Gaheris, both among the closest of Launcelot’s friends and both killed by his own hand.  Gawaine, their brother, one of the most powerful knights in the court, vowed vengeance for their death and swore to follow Launcelot to the ends of the earth.  Launcelot protested that he should never cease to mourn for Sir Gareth and that he would as soon have slain his own nephew as to harm the man whom he made knight and whom he loved as a brother.

“Liar and traitor,” cried Sir Gawaine, “you are a traitor both to the king and to me.”

Launcelot replied, “I see that never again shall I have your love, though I pray you remember that at one time we were friends, and that once you were indebted to me for your life.”

“I care not,” said Sir Gawaine, fiercely; “nor do I care for the friendship of the king.  As for you, in open combat or by stealth, your life will I have; and as for the king, if he will not aid me now I shall leave his kingdom and fight even against him.”

“Cease this brawling before me,” said the king.  “It is better for us all that Launcelot should depart.”  Thus was Arthur’s greatest knight banished from the kingdom.

This, however, did not terminate the difficulty.  Arthur and Gawaine followed Launcelot to France, where in a terrible battle Gawaine was unhorsed and borne to the ground by Sir Launcelot, who, however, declined to kill the valiant knight, although Gawaine still accused him of being a traitor and declared that his enmity should never cease while life lasted.  Launcelot had gathered a large following in France, and while Gawaine was being healed of his wounds there was peace between the armies.

In the meantime, Sir Mordred, the traitorous nephew of King Arthur, remained in England and instigated a rebellion against the king.  He summoned a parliament and caused himself to be elected king.  Queen Guinevere hid herself in the tower of London and could not be induced to leave by threat or entreaty, for she knew that Mordred’s purpose was to make her his wife.

This news came to Arthur while he was encamped at Benwick where the battle between his forces and Launcelot’s had taken place.  Arthur immediately gathered his forces together and set sail for Britain.  Mordred learned of his approach and gathered a great army at Dover, where he expected Sir Arthur to arrive, and where he lay in wait in the harbor with a great array of ships of all kinds.

Nothing daunted King Arthur, however, and in a fierce naval battle the forces of Mordred were defeated, while the traitor fled westward, where he gathered his scattered hosts.  There were among his men many of King Arthur’s favorite knights, men whom he had showed every favor and who were indebted to him for all that they possessed.  The desertion of these men made Arthur sorry at heart and left him little joy in his successful battle.  As soon as he could he landed and went about among the wounded of his own army and of his enemies, binding up their wounds and giving comfort to those who were dying.  The dead he buried with honors of war whether they were his opponents or his friends.