A honno oed tryded prif rieni yn yr ynys hon
(And she was one of the three great progenitors of this Island)
How far back before her story was told
Did she proffer the cup of sovereignty of the Island
Her giant brother – or other self – holding it as a cauldron
Before the spring which pulses beneath Loch Febuil flooded the fair plain
So that the one who plundered and the one who held the treasure became one
Long before the islands of Britain and Ireland were sundered
Before the wolf-grey seas rushed in and so they were separate
Brother and Sister in the legends of the land
(though he would be a bridge between them).
Who then sought sovereignty and where was its source?
Each of them buried deep in the Earth of the Island
Held it in safe keeping : She in a grave at Aber Alaw,
He under the White Mount where Arthur sought him
Taking the sovereignty to hold for his own:
The raid on the White Mount, the raid on Annwfn,
The raid for the Cauldron there and in Ireland
Retelling the story over and over again
(as Culhwch got Olwen and the Giant was vanquished)
Re-living the quest of Bran for the Cauldron
Beneath the spring where Branwen held it.
In the Welsh of the Second Branch of the Mabinogi Brân – or Bendigeidfran – is a giant and is brother to Branwen and Manawydan, offspring of Llŷr. Brân has a cauldron which came with another giant from under a lake in Ireland and is sent back to Ireland with Matholwch when he marries Branwen.
In the well-known Irish story of Bran Son of Febul he sets off in a ship to sail to the Otherworld and meets Manannan Mac Lir on the sea who directs him on his way.
The lesser known story about Bran Son of Febul is recounted in some verses recording an exchange between Febul’s Prophetess and Bran’s Druid. The druid recounts how he had a vision of treasure hidden under a spring and of Bran’s quest to recover it. The Prophetess tells of how beautiful the plain around the spring was before the treasure was taken and how the land was flooded because Bran’s expedition offended the female guardians of the spring. The resultant flood formed Loch Febuil, now known as Lough Foyle.
Arthur in the Welsh poem Preiddeu Annwn, from The Book of Taliesin, sails in his ship Prydwen to raid the Otherworld in search of treasure, in particular a cauldron. One of his men, Lleawc, thrusts his sword into the Cauldron. In the Welsh tale of Culhwch and Olwen, Arthur sails to Ireland to get a cauldron. One of his men, Llenlleawc, said himself to be an Irishmen, wielding Arthur’s sword, captures the Cauldron.
Brân’s head was buried beneath the White Mount to protect the Island of Britain. In one of the Welsh triads, Arthur is said to have dug up the head because he wanted to be the sole protector of the Island. So the symbol of sovereignty became the Crown.