Note 19 — Chapter VI · The Folklore of the Wells

That is what I wrote when penning these notes; but it has occurred to me since then, that there is an Irish name, an important Irish name, which looks as if related to Seithenhin, and that is Setanta Beg, ‘the little Setantian,’ the first name of the Irish hero Cúchulainn. The nt, I may point out, makes one suspect that Setanta is a name of Brythonic origin in Irish; and I have been in the habit of associating it with that of the people of the Setantii19, placed by Ptolemy on the coast of what is now Lancashire. Whether any legend has ever been current about a country submerged on the coast of Lancashire I cannot say, but the soundings would make such a legend quite comprehensible. I remember, however, reading somewhere as to the Plain of Muirthemhne, of which Cúchulainn, our Setanta Beg, had special charge, that it was so called because it had once been submarine and become since the converse, so to say, of Seithennin’s country. The latter is beneath Cardigan Bay, while the other fringed the opposite side of the sea, consisting as it did of the level portion of County Louth. On the whole, I am not altogether indisposed to believe that we have here traces of an ancient legend of a wider scope than is represented by the Black Book triplets, which I have essayed to translate. I think that I am right in recognizing that legend in the Mabinogi of Branwen, daughter of Ỻyr. There we read that, when Brân and his men crossed from Wales to Ireland, the intervening sea consisted merely of two navigable rivers, called Ỻi and Archan. The story-teller adds words to the effect, that it is only since then the sea has multiplied its realms20 between Ireland and Ynys y Kedyrn, or the Isle of the Keiri, a name which has already been discussed: see pp. 279–83.