“Send for Cuchulain,” then said King Conor. And they sent a messenger to Dundalk, where Cuchulain was with Emer his wife, and bade him come to do battle against a stranger boy whom Conall of the Victories could not overcome. Emer threw her arm round Cuchulain’s neck. “Do not go,” she entreated. “Surely this is the son of Aifa. Slay not thine only son.” But Cuchulain said: “Forbear, woman! Were it Connla himself I would slay him for the honour of Ulster,” and he bade yoke his chariot and went to the Strand. Here he found the boy tossing up his weapons and doing marvellous feats with them. “Delightful is thy play, boy,” said Cuchulain; “who art thou and whence dost thou come?” “I may not reveal that,” said the lad. “Then thou shalt die,” said Cuchulain. “So be it,” said the lad, and then they fought with swords for a while, till the lad delicately shore off a lock of Cuchulain’s hair. “Enough of trifling,” said Cuchulain, and they closed with each other, but the lad planted himself on a rock and stood so firm that Cuchulain could not move him, and in the stubborn wrestling they had the lad’s two feet sank deep into the stone and made the footprints whence the Strand of the Footprints has its name. At last they both fell into the sea, and Cuchulain was near being drowned, till he bethought himself of the Gae Bolg, and he drove that weapon against the lad and it ripped up his belly. “That is what Skatha never taught me,” cried the lad. “Woe is me, for I am hurt.” Cuchulain looked at him and saw the ring on his finger. “It is true,” he said; and he took up the boy and bore him on shore and laid him down before Conor and the lords of Ulster. “Here is my son for you, men of Ulster,” he said. And the boy said: “It is true. And if I had five years to grow among you, you would conquer the world on every side of you and rule as far as Rome. But since it is as it is, point out to me the famous warriors that are here, that I may know them and take leave of them before I die.” Then one after another they were brought to him, and he kissed them and took leave of his father, and he died; and the men of Ulster made his grave and set up his pillar-stone with great mourning. This was the only son Cuchulain ever had, and this son he slew. This tale, as I have given it here, dates from the ninth century, and is found in the “Yellow Book of Lecan.” There are many other Gaelic versions of it in poetry and prose. It is one of the earliest extant appearances in literature of the since well-known theme of the slaying of a heroic son by his father. The Persian rendering of it in the tale of Sohrab and Rustum has been made familiar by Matthew Arnold’s fine poem. In the Irish version it will be noted that the father is not without a suspicion of the identity of his antagonist, but he does battle with him under the stimulus of that passionate sense of loyalty to his prince and province which was Cuchulain’s most signal characteristic.