I could find no score for this tune except the one a bandmate had so am posting it now. The key may be a mix or dorian rather than major. I’m sure that will be noted before long. Actually a song from County Mayo, the lyrics are a potem by Rafferty easily found on the Web.
This is a very similar tune (if not a variation) of a jig called "Bold Thady Quill" (elsewhere on this site).
Re: Cill Aodáin
The Melody also resembles the The Fairy King’s Courtship that Malinky do on their Album Far Better Days