The song was also recorded as Barna Hill--same lyrics, different spelling:

https://www.youtube.com/watch?v=Ij5tmme12TQ

I found the following

" “Barna Hill” is a song describing the view from Barna Hill in Limerick, which Irvine first heard sung by an old man in 1963 at a Fleadh Cheoil in Newcastlewest, County Limerick. '

That is from

https://andyirvinelyrics.wordpress.com/2014/02/13/barna-hill/


That said, I doubt the author's name will be located all that easily.