"It is very well to talk about it," said Sir Kai, "but 'tis harder to carry it out."

Then Owain went away, and prepared his horse and his armour, and very early next morning he rode away in the direction which Kynon had pointed out to him.

In due time he reached the castle, and was kindly received by the Man in Yellow, and set down before a very excellent meal. And the four and twenty maidens seemed even lovelier to Owain than they had to Kynon.

When they asked him his errand Owain replied that he was in quest of the knight who guards the fountain; and the Yellow Man, though very reluctantly, pointed out the way. All happened to Owain as it had to Kynon, save that the shower seemed more violent and the song of the birds even sweeter than before. And as they sang the Black Knight appeared, and rode violently upon Owain; but he was prepared to receive him, and they fought fiercely together. Their lances broke with the shock of their attack, and, drawing their swords, they fought until Owain struck the knight a blow which pierced through helmet, skull, and brain.

Then the Black Knight, knowing he had received a mortal blow, turned his horse, and fled. But Owain pursued hard after him until they came to a lordly castle. When they reached the gate the Black Knight was allowed to enter; but Owain was so close behind that, when the portcullis fell, it struck his horse behind the saddle, and cut him in two, carrying away the rowels of the spurs which were on Owain's heels. So the rowels and part of the horse were outside and Owain was shut up inside with the other part of the horse between the two gates, for the inner one was closed. As the knight stood wondering what would happen next he saw through an opening in the upper part of the gate a street facing him, with a row of houses on either side; and from one of these houses came out a maiden, with yellow, curling locks, dressed in yellow satin, with shoes of parti-coloured leather. She approached the gate, and desired him to open it. "Truly, lady," said Owain ruefully, "I can no more open it for you than you can for me."

"That is very sad," said the damsel; "yet it is the part of every woman to do what she can to succour you, for you are a loyal squire of dames, so I will do whatever is in my power for you. Take this ring, and put it on your finger, with the stone inside your hand, and close your hand upon the stone. As long as you conceal it, it will conceal you. Presently, when they have consulted together, they will come to fetch you, in order to put you to death, and will be much upset when they cannot find you. But I shall sit on the horse-block yonder, and you will see me though I cannot see you. Come, therefore, and put your hand upon my shoulder, that I may know you are near; and whichever way I go, do you follow me."

So Owain vanished from the sight of men, and sorely grieved were his foes when they came to seek him and found only part of his horse. But he found the maiden, and laid his hand upon her shoulder; and she led him to a splendid chamber, where even the nails were painted in beautiful colours, and there she gave him abundance of food in silver dishes, and left him to rest. Now, on that night the nobleman who owned the castle, whom Owain had so grievously wounded, died; and the maiden of the golden locks presently brought Owain to a window from whence he might see the funeral procession. And foremost among the mourners walked the Countess of that domain. She was so very beautiful that Owain fell deeply in love with her, and said to the maiden: "Verily, there goes the woman I love best in the world."

"Truly," said the maiden, "she too shall love you not a little, and I will go woo for thee."

So the maiden, whose name was Luned, went to the chamber of her mistress the Countess, and found her weeping, because now the Black Knight was slain, there was no one to defend her dominions. For so it was that, so long as the fountain was safe, all was well, but if that were not defended, all her lands would soon be lost.

Then Luned said: "Surely you know that no one can defend the fountain except he be a knight of Arthur's household. Let me go to Arthur's Court, and I will bring back with me a warrior who can guard the fountain as well as, or even better than, he who kept it formerly."