Damn, know I have the words somewhere - probably on an old CD in the attic, apparently, because I've hunted through Blas Meala and Ceol 1 and 2 and An Duanaire etc etc and no sign of them. The song (the version I'm thinking of) starts "Tá féar fad is fásach i ngleanntán álainn i bhfad ó bhaile", or "There is long grass and wilderness in a beautiful little glen far from home", and has a lovely example of the use of the conditional 'if' in Irish.
In Irish there are two versions of 'if' statements, one, using the word 'má' with the present tense - 'má éiríonn leis an Íoslann" ("If Iceland succeeds") and meaning something that is likely to happen; the other, using the word 'dá' and the conditional tense, suggesting that the thing you're talking about is unlikely.
In this Cúachín, there is the longing thought "Dá mbéinnse is mo stoirín pósta, is an saol ag dul i gceart dúinn" ("If I and my beloved were married and life going right with us" - but it's expressed with that negative 'if', suggesting that this is a wild dream, and the made match with a nice sensible widow with a freehold and plenty of land is more likely.