The Birth of Pryderi

From the First Branch of Y Mabinogi

(Rhiannon's baby has been snatched away, 

then the action switches to Teyrnon in Gwent):

Teyrnon had the mare brought into the house, then he armed himself for his vigil. As darkness fell, the mare gives birth to a large, good-looking foal, standing up on its feet. Teyrnon gets up to admire the sturdiness of the foal. As he does so, he hears a mighty commotion - and, following this commotion an enormous claw appears through the window, seizing the colt by its mane. Then what Teyrnon does is draw his sword and cut the arm from the elbow down - so that most of the arm, together with the colt, is inside the house.

Then he hears the sound of a commotion and a scream together. He opens the door and follows the commotion. He can't see where it is coming from as the night is so dark. But he keeps going towards it. Then he remembers that the door is open and goes back. By the door what does he see but a small child in swaddling clothes, wrapped in a sheet of brocaded silk. He picks up the boy, and observes that he is strong for his age.

The Enchanted Fort

From the Third Branch of Y Mabinogi

[Manawydan and Pryderi are following a shining white boar which leads them to an empty fort into which the boar has disappeared. Pryderi wants to follow. Manawydan says]:

“It is not a good idea to go into the fort. We have not seen the fort here before and my advice is not to go near it.” But Pryderi replies, “I will not abandon my hounds” and, in spite of Manawydan’s counsel, goes to the fort.

[…..]

After waiting to see if Pryderi will return, Manawydan returns home without him.

When he comes in, Rhiannon looks up and asks “Your companion and the dogs, where are they?” He told her the tale. “Indeed, you were a poor companion, and it’s a good companion that you have lost”. With that word she went off to where he said the fort was.

She saw that the gate was open, and it was not hidden. In she came and discovered Pryderi grasping a basin [attached to a fountain] and said “Oh my lord, what are you doing here?” She took hold of the basin. As soon as she does this, her hands also stick to the basin and her feet to the base of the fountain, and she is struck dumb.

As soon as night fell, behold, a great tumult, a shower of mist, and the fort disappears with them in it