Note 9 — Chapter I · Undine’s Kymric Sisters (continued 2)
Reading edition
It was evidently the last braich, “arm,” of a Triban Morgannwg, but this was all my informant knew of it. From the allusion to Tre’ Byrhonđu, it struck me that there was here probably a tale of Ỻyn Safađon, which had migrated to Ỻyn y Fan; because of course there would have to be a considerable change in the “levels” before Ỻyn y Fan and the Sawđe could put Brecon in any great jeopardy9.