An unrelated song.

Those sleeve notes were rather misleading: the song is not "very old"; the tune is older, but not necessarily by a great deal. The words of the song were written by Sir Harold Boulton to a traditional tune, My Wife is Sick. There are Irish Gaelic words, but they are a translation into Irish of Boulton's lyric, made by Douglas Hyde. Subsequently a good few people have assumed (having not read the book in which the song was published in 1892) that the Irish words must be older, and a rumour has long circulated that they are 18th century, which would have surprised Hyde!

A quick search of the Forum via the onsite search engine ("Lyrics and Knowledge Search" at the top of every page) will find you, among other discussions of the song here, this thread: Help: Castle of Dromore; origins and location. Info on the history of the song (what there is of it) and a reasonably firm identification of the locale as Dromore at Blackwater Bridge, Kerry.