Irish Gaelic. Blond Mary Chinidh, whose mother is a mermaid, swims Lake Erne forever. She loves blond sailor Patrick.
The description follows the translation for "An Mhaighdean Mara" at _Clannad_ on Celtic Lyrics Corner site. - BS
Paul Stamler gives this description of Kitty Gallagher's version, which is however a translation of an excerpt of a fragment: "The singer, Mary Heeney, having swum the Erne, speaks to her girl Maire and (husband?) Patrick. Maire then speaks, saying that her mother was a mermaid." - PHS, (RBW)