’And Bran commanded them that they should cut off his head.  And take you my head, said he, and bear it even unto the White Mount in London, and bury it there with the face towards France.  And a long time will you be upon the road.  In Harlech you will be feasting seven years, the birds of Rhiannon singing unto you the while.  And all that time the head will be to you as pleasant company as it ever was when on my body.  And at Gwales in Penvro you will be fourscore years, and you may remain there, and the head with you uncorrupted, until you open the door that looks towards Aber Henvelen and towards Cornwall.  And after you have opened that door, there you may no longer tarry; set forth then to London to bury the head, and go straight forward.

’So they cut off his head, and those seven went forward therewith.  And Branwen was the eighth with them, and they came to land at Aber Alaw in Anglesey, and they sate down to rest.  And Branwen looked towards Ireland and towards the Island of the Mighty, to see if she could descry them.  “Alas,” said she, “woe is me that I was ever born; two islands have been destroyed because of me.”  Then she uttered a loud groan, and there broke her heart.  And they made her a four-sided grave, and buried her upon the banks of the Alaw.

’Then they went to Harlech, and sate down to feast and to drink there; and there came three birds and began singing, and all the songs they had ever heard were harsh compared thereto; and at this feast they continued seven years.  Then they went to Gwales in Penvro, and there they found a fair and regal spot overlooking the ocean, and a spacious hall was therein.  And they went into the hall, and two of its doors were open, but the third door was closed, that which looked towards Cornwall.  “See yonder,” said Manawyddan, “is the door that we may not open.”  And that night they regaled themselves and were joyful.  And there they remained fourscore years, nor did they think they had ever spent a time more joyous and mirthful.  And they were not more weary than when first they came, neither did they, any of them, know the time they had been there.  And it was as pleasant to them having the head with them as if Bran had been with them himself.

’But one day said Heilyn, the son of Gwyn:  “Evil betide me if I do not open the door to know if that is true which is said concerning it.”  So he opened the door and looked towards Cornwall and Aber Henvelen.  And when they had looked, they were as conscious of all the evils they had ever sustained, and of all the friends and companions they had lost, and of all the misery that had befallen them, as if all had happened in that very spot; and especially of the fate of their lord.  And because of their perturbation they could not rest, but journeyed forth with the head towards London.  And they buried the head in the White Mount.’

Arthur afterwards, in his pride and self-confidence, disinterred the head, and this was one of ’the three unhappy disclosures of the island of Britain.’