Grugyn Gwrych Ereint made answer to him. (Now his bristles were like silver wire, and whether he went through the wood or through the plain, he was to be traced by the glittering of his bristles.) And this was the answer that Grugyn made:

“By him who turned us into this form, we will not do so, and we will not speak with Arthur. That we have been transformed thus is enough for us to suffer, without your coming here to fight with us.”

“I will tell you. Arthur comes but to fight for the comb, and the razor, and the scissors which are between the two ears of Twrch Trwyth.”

Said Grugyn, “Except he first take his life, he will never have those precious things. And to-morrow morning we will rise up hence, and we will go into Arthur’s country, and there will we do all the mischief that we can.”

So they set forth through the sea towards Wales. And Arthur and his hosts, and his horses and his dogs, entered Prydwen, that they might encounter them without delay.

Twrch Trwyth landed in Porth Cleis in Dyved, and Arthur came to Mynyw. The next day it was told to Arthur that they had gone by, and he overtook them as they were killing the cattle of Kynnwas Kwrr y Vagyl, having slain all that were at Aber Gleddyf, of man and beast, before the coming of Arthur.

Now when Arthur approached, Twrch Trwyth went on as far as Preseleu, and Arthur and his hosts followed him thither, and Arthur sent men to hunt him; Eli and Trachmyr, leading Drudwyn the whelp of Greid the son of Eri, and Gwarthegyd the son of Kaw, in another quarter, with the two dogs of Glythmyr Ledewic, and Bedwyr leading Cavall, Arthur’s own dog. And all the warriors ranged themselves around the Nyver.

And there came there the three sons of Cleddyf Divwlch, men who had gained much fame at the slaying of Yskithyrwyn Penbaedd; and they went on from Glyn Nyver, and came to Cwm Kerwyn.

And there Twrch Trwyth made a stand, and slew four of Arthur’s champions, Gwarthegyd the son of Kaw, and Tarawc of Allt Clwyd, and Rheidwn the son of Eli Atver, and Iscovan Hael.

And after he had slain these men, he made a second stand in the same place. And there he slew Gwydre the son of Arthur, and Garselit Wyddel, and Glew the son of Ysgawd, and Iscawyn the son of Panon; and there he himself was wounded.

And the next morning before it was day, some of the men came up with him. And he slew Huandaw, and Gogigwr, and Penpingon, three attendants upon Glewlwyd Gavaelvawr, so that Heaven knows he had not an attendant remaining, excepting only Llaesgevyn, a man from whom no one ever derived any good.

And together with these he slew many of the men of that country, and Gwlydyn Saer, Arthur’s chief Architect.

Then Arthur overtook him at Pelumyawc, and there he slew Madawc the son of Teithyon, and Gwyn the son of Tringad, the son of Neved, and Eiryawn Penllorau.

Thence he went to Aberteivi, where he made another stand, and where he slew Kyflas the son of Kynan, and Gwilenhin king of France.

Then he went as far as Glyn Ystu, and there the men and the dogs lost him.

Then Arthur summoned unto him Gwyn ab Nudd, and he asked him if he knew aught of Twrch Trwyth. And he said that he did not.

And all the huntsmen went to hunt the swine as far as Dyffryn Llychwr. And Grugyn Gwallt Ereint and Llwydawg Govynnyad closed with them and killed all the huntsmen, so that there escaped but one man only.

And Arthur and his hosts came to the place where Grugyn and Llwydawg were. And there he let loose the whole of the dogs upon them, and with the shout and barking that was set up, Twrch Trwyth came to their assistance.

And from the time that they came across the Irish sea, Arthur had never got sight of him until then. So he set men and dogs upon him, and thereupon he started off and went to Mynydd Amanw. And there one of his young pigs was killed.

Then they set upon him life for life, and Twrch Llawin was slain, and then there was slain another of the swine, Gwys was his name.

After that he went on to Dyffryn Amanw, and there Banw and Bennwig were killed. Of all his pigs there went with him alive from that place none save Grugyn Gwallt Ereint and Llwydawg Govynnyad.

Thence he went on to Llwch Ewin, and Arthur overtook him there, and he made a stand. And there he slew Echel Forddwytwll, and Garwyli the son of Gwyddawg Gwyr, and many men and dogs likewise.

And thence they went to Llwch Tawy. Grugyn Gwrych Ereint parted from them there, and went to Din Tywi.

And thence he proceeded to Ceredigiawn, and Eli and Trachmyr with him, and a multitude likewise.

Then he came to Garth Gregyn, and there Llwydawg Govynnyad fought in the midst of them, and slew Rhudvyw Rhys and many others with him.

Then Llwydawg went thence to Ystrad Yw, and there the men of Armorica met him, and there he slew Hirpeissawg the king of Armorica, and Llygatrudd Emys, and Gwrbothu, Arthur’s uncles, his mother’s brothers, and there was he himself slain.

Twrch Trwyth went from there to between Tawy and Euyas, and Arthur summoned all Cornwall and Devon unto him, to the estuary of the Severn, and he said to the warriors of this Island, “Twrch Trwyth has slain many of my men, but, by the valour of warriors, while I live he shall not go into Cornwall. And I will not follow him any longer, but I will oppose him life to life. Do ye as ye will.”

And he resolved that he would send a body of knights, with the dogs of the Island, as far as Euyas, who should return thence to the Severn, and that tried warriors should traverse the Island, and force him into the Severn.

And Mabon the son of Modron came up with him at the Severn, upon Gwynn Mygdwn, the horse of Gweddw, and Goreu the son of Custennin, and Menw the son of Teirgwaedd; this was betwixt Llyn Lliwan and Aber Gwy. And Arthur fell upon him together with the champions of Britain.