The lord of the castle where they were prisoners was the falsest knight alive, a treacherous, cowardly man, named Sir Damas. He had a younger brother, Sir Ontzlake, a good knight of prowess, well beloved of all people, from whom he was keeping back unjustly a full fair manor. Great war had been betwixt these brothers. Ontzlake was a far better fighter than the cowardly Damas, and yet he could not bring the elder to give over the younger brother's inheritance. He offered to fight for it, and wished Sir Damas to find a knight to fight in his stead, if he himself dared not engage. But Sir Damas was so hated that there was never one would fight for him, though he had by force taken all the knights of that whole region and brought them to his prison for to make them willing to take up his cause. Many had died there, and the twenty that were yet alive were lean and spent with hunger, but no one of them would stand against Sir Ontzlake.

Anon there came a damsel unto Arthur and asked him, "What cheer?" "I cannot say," said he. "Sir," said she, "if ye will fight for my lord, ye shall be delivered out of prison, and else ye escape never with life."

"Now," said Arthur, "that is hard, yet had I liefer to fight with a knight than to die in prison," and so it was agreed that he should do the battle on this covenant, that he should be delivered and all the prisoners. With that all the twenty knights were brought out of the dark prison into the hall, and set free, but they all abode to see the battle.

Now turn we unto Accolon of Gaul, that was with King Arthur and King Uriens on the stag-hunt and that fell asleep on the magic ship. When he awoke he found himself beside a deep well, within half a foot of its edge, in great peril of death.

"Heaven save my lord King Arthur and King Uriens," said he, "for these damsels in the ship have betrayed us. They were devils and no women, and if I may escape this misadventure, I shall destroy all false damsels that use enchantments, wherever I may find them."

Right then there came a dwarf with a great mouth and a flat nose, and saluted Sir Accolon and said he came from Queen Morgan le Fay. "She greeteth you well," said he, "and biddeth you be of strong heart, for ye shall fight to-morn with a knight at the hour of prime, and therefore she hath sent you here Excalibur, Arthur's sword, and the scabbard, and she biddeth you as ye love her, that ye do the battle to the uttermost without any mercy, like as ye promised her when ye spake together in private."

Sir Accolon believed he fully understood the message, and he said he should keep his promise now that he had the sword. Just then a knight, who was no other than Sir Ontzlake himself, with a lady and six squires, came up on horseback, saluted Sir Accolon, and begged him to come and rest himself at his manor. So Accolon mounted upon a spare horse and rode to the manor, where he had passing good cheer.

Meantime Sir Damas sent to his brother, Sir Ontzlake, and bade him make ready to fight the next day with a good knight who had agreed to do battle for the disputed heritage; and it happened through Morgan le Fay's trickery that Accolon was lodged with Sir Ontzlake at the very time when this message came. Now Sir Ontzlake was sore troubled at the message, for he had been wounded in both thighs by a spear a short time before, and was suffering much. Still, wounded as he was, he would have taken the battle in hand, had not Sir Accolon offered to fight in his stead, because Morgan le Fay had sent Excalibur and the sheath for the battle with the knight on the morrow. Then Sir Ontzlake was passing glad, and sent word unto his brother, Sir Damas, that he had a knight who would be ready in the field by to-morrow at the hour of prime.

So it was arranged that Sir Arthur and Sir Accolon, unknown to one another, were to fight over the quarrel of the two brothers. Preparations were made accordingly, and all the knights and commons of the country were there to see the encounter. Just as Arthur was ready upon horseback, there came a damsel from Morgan le Fay bringing unto him a sword like unto Excalibur, and the scabbard, and said: "Morgan le Fay sendeth you here your sword for great love." He thanked her, not knowing that the sword and scabbard were counterfeit, and brittle and false.

They went eagerly to the battle, and gave many great strokes. Sir Accolon had all advantage on his side, for he had the real Excalibur, Morgan le Fay having so ordained that King Arthur should have been slain that day. King Arthur's sword never bit like Sir Accolon's, and almost every stroke Sir Accolon gave wounded sore, so that it was a marvel that Arthur stood. Almost from the first it seemed to him that the sword in Accolon's hand must be Excalibur, but he was so full of knighthood that knightly he endured the pain of the many wounds, and held out as well as he might until his sword brake at the cross and fell in the grass among the blood.