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 Mygddon, 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. And Osla Kyllellvawr drew near, and Manawyddan the son of Llyr, and Kacmwri the servant of Arthur, and Gwyngelli, and they seized hold of him, catching him first by his feet, and plunged him in the Severn, so that it overwhelmed him. On the one side, Mabon the son of Modron spurred his steed and snatched his razor from him, and Kyledyr Wyllt came up with him on the other side, upon another steed, in the Severn, and took from him the scissors. But before they could obtain the comb, he had regained the ground with his feet, and from the moment that he reached the shore, neither dog, nor man, nor horse could overtake him until he came to Cornwall. If they had had trouble in getting the jewels from him, much more had they in seeking to save the two men from being drowned. Kacmwri, as they drew him forth, was dragged by two millstones into the deep. And as Osla Kyllellvawr was running after the Boar his knife had dropped out of the sheath, and he had lost it, and after that the sheath became full of water, and its weight drew him down into the deep, as they were drawing him forth.