nephew." "Verily," said Math, "may Heaven be thy strength." Then Gwydion set forth and began to go forward. And he went through Gwynedd and Powys to the confines. And when he had done so, he went into Arvon, and came to the house of a vassal, in Maenawr Penardd. And he alighted at the house, and stayed there that night. The man of the house and his house-hold came in, and last of all came there the swineherd. Said the man of the house to the swineherd, "Well, youth, hath thy sow come in to-night?" "She hath," said he, "and is this instant returned to the pigs." "Where doth this sow go to?" said Gwydion. "Every day, when the sty is opened, she goeth forth and none can catch sight of her, neither is it known whither she goeth more than if she sank into the earth." "Wilt thou grant unto me," said Gwydion, "not to open the sty until I am beside the sty with thee?" "This will I do, right gladly," he answered.
That night they went to rest; and as soon as the swineherd saw the light of day, he awoke Gwydion. And Gwydion arose and dressed himself, and went with the swineherd, and stood beside the sty. Then the swineherd opened the sty. And as soon as he opened it, behold she leaped forth, and set off with great speed. And Gwydion followed her, and she went against the course of a river, and made for a brook, which is now called Nant y Llew. And there she halted and began feeding. And Gwydion came under the tree, and looked what it might be that the sow was feeding on. And he saw that she was eating putrid flesh and vermin. Then looked he up to the top of the tree, and as he looked he beheld on the top of the tree an eagle, and when the eagle shook itself, there fell vermin and putrid flesh from off it, and these the sow devoured. And it seemed to him that the eagle was Llew. And he sang an Englyn:-
"Oak that grows between the two banks;
Darkened is the sky and hill!
Shall I not tell him by his wounds,
That this is Llew?"
