All that day they journeyed until the evening, and then they beheld a vast castle, which was the largest in the world. And lo! a black man, larger than three of the men of this world, came out from the castle. And they spoke unto him, and said, “O man, whose castle is that?” “Stupid are ye, truly, O men! There is no one in the world that does not know that this is the castle of Gwernach the Giant.” “What treatment is there for guests and strangers that alight in that castle?” “O chieftain, Heaven protect thee! No guests ever returned thence alive, and no one may enter therein unless he brings with him his craft.”

Then they proceeded towards the gate. Said Gurhyr Gwalstat, “Is there a porter?” “There is; wherefore dost thou call?” “Open the gate.” “I will not open it.” “Wherefore wilt thou not?” “The knife is in the meat, and the drink is in the horn, and there is revelry in the hall of Gwernach the Giant; and except for a craftsman who brings his craft, the gate will not be opened to-night.” “Verily, porter,” then said Kay, “my craft bring I with me.” “What is thy craft?” “The best burnisher of swords am I in the world.” “I will go and tell this unto Gwernach the Giant, and I will bring thee an answer.”

So the porter went in, and Gwernach said to him, “Hast thou news from the gate?” “I have. There is a party at the door of the gate who desire to come in.” “Didst thou inquire of them if they possessed any art?” “I did inquire,” said he, “and one told me that he was well skilled in the burnishing of swords.” “We have need of him then. For some time have I sought for some one to polish my sword, and could find no one. Let this man enter, since he brings with him his craft.”

The porter thereupon returned and opened the gate. And Kay went in by himself, and he saluted Gwernach the Giant. And a chair was placed for him opposite to Gwernach. And Gwernach said to him, “O man, is it true that is reported of thee, that thou knowest how to burnish swords?” “I know full well how to do so,” answered Kay. Then was the sword of Gwernach brought to him. And Kay took a blue whetstone from under his arm, and asked whether he would have it burnished white or blue. “Do with it as it seems good to thee, or as thou wouldst if it were thine own.” Then Kay polished one half of the blade, and put it in his hand. “Will this please thee?” asked he. “I would rather than all that is in my dominions that the whole of it were like this. It is a marvel to me that such a man as thou should be without a companion.” “O noble sir, I have a companion, albeit he is not skilled in this art.” “Who may he be?” “Let the porter go forth, and I will tell him whereby he may know him. The head of the lance will leave its shaft, and draw blood from the wind, and will descend upon its shaft again.” Then the gate was opened, and Bedwyr entered. And Kay said, “Bedwyr is very skilful, though he knows not this art.”

And there was much discourse among those who were without, because that Kay and Bedwyr had gone in. And a young man who was with them, the only son of the herdsman, got in also; and he contrived to admit all the rest, but they kept themselves concealed.

The sword was now polished, and Kay gave it unto the hand of Gwernach the Giant, to see if he were pleased with his work. And the giant said, “The work is good; I am content therewith.” Said Kay, “It is thy scabbard that hath rusted thy sword; give it to me, that I may take out the wooden sides of it, and put in new ones.” And he took the scabbard from him, and the sword in the other hand. And he came and stood over against the giant, as if he would have put the sword into the scabbard; and with it he struck at the head of the giant, and cut off his head at one blow. Then they despoiled the castle, and took from it what goods and jewels they would. And they returned to Arthur’s court, bearing with them the sword of Gwernach the Giant.

And when they told Arthur how they had sped, Arthur said, “It is a good beginning.” Then they took counsel, and said, “Which of these marvels will it be best for us to seek next?” “It will be best,” said one, “to seek Mabon, the son of Modron; and he will not be found unless we first find Eidoel, the son of Aer, his kinsman.” Then Arthur rose up, and the warriors of the island of Britain with him, to seek for Eidoel; and they proceeded until they came to the castle of Glivi, where Eidoel was imprisoned. Glivi stood on the summit of his castle, and he said, “Arthur, what requirest thou of me, since nothing remains to me in this fortress, and I have neither joy nor pleasure in it, neither wheat nor oats? Seek not, therefore, to do me harm.” Said Arthur, “Not to injure thee came I hither, but to seek for the prisoner that is with thee.” “I will give thee my prisoner, though I had not thought to give him up to any one, and therewith shalt thou have my support and my aid.”

His followers said unto Arthur, “Lord, go thou home, thou canst not proceed with thy host in quest of such small adventures as these.” Then said Arthur, “It were well for thee, Gurhyr Gwalstat, to go upon this quest, for thou knowest all languages, and art familiar with those of the birds and the beasts. Thou, Eidoel, oughtest likewise to go with thy men in search of thy cousin. And as for you, Kay and Bedwyr, I have hope of whatever adventure ye are in quest of, that ye will achieve it. Achieve ye this adventure for me.”

They went forward until they came to the Ousel of Cilgwri. And Gurhyr adjured her, saying, “Tell me if thou knowest aught of Mabon, the son of Modron, who was taken when three nights old from between his mother and the wall?” And the Ousel answered, “When I first came here, there was a smith’s anvil in this place, and I was then a young bird; and from that time no work has been done upon it, save the pecking of my beak every evening; and now there is not so much as the size of a nut remaining thereof; yet during all that time I have never heard of the man for whom you inquire. Nevertheless, I will do that which it is fitting that I should for an embassy from Arthur. There is a race of animals who were formed before me, and I will be your guide to them.”

So they proceeded to the place where was the Stag of Redynvre. “Stag of Redynvre, behold, we are come to thee, an embassy from Arthur, for we have not heard of any animal older than thou. Say, knowest thou aught of Mabon, the son of Modron, who was taken from his mother when three nights old?&rd............