I rang the Traditional Music Archive, and they told me there were two versions on disk, or maybe three, on three CDs.

One was on Sara Ghriallais's new album of sean-nós from Connemara, which I got - it's beautiful, unaccompanied, but a bit hard to follow. It's a fabulous album, though, produced by French company Cinq Planetes.

The other two were on two albums by Ragús, one called just Ragús, the other either Ragús Anseo or (more likely) Ragús, An Seó. Haven't got either of these yet.