I'm hardly a scholar but I do have the song in an old book (Cnuasacht de Cheoltaí Uladh). It's so old, in fact, that I had to insert "h's" in place of the shavus! (sorry about my spelling). The text is basically the same and there are no notes as to the origin of the song but it does have the air notated. I'll see if I can put it into ABC.

The immediate problem with that is the time signature: it wanders irregularly between 3/4 and 2/4. How does ABC convention deal with that? Can anyone help there?

I was thinking of just eliminating the time signature completely and notating it with no bar lines. But would that render it unreadable to a computer?

It just shows how inadequate our notation is to capture sean nós.

Slán agus le súil go síocháin,

David