Well, one thing you could do would be to make use of the excellent search facilities that we have here; I'd particularly recommend the Digitrad and Forum Search, which is displayed quite prominently on the main Forum page.  A search for two little boys through this would get you plenty of references, which would include more than seven previous discussions of the song, in almost all of which somebody or other has posted lyrics to -usually- the "Country Gentlemen" and Rolf Harris recordings, and, several times, a recent parody.  You would also find that the song has variously been placed in the American Civil War, the Crimean War, and Australia's involvement in the First World War.  Nobody has ever mentioned Ireland, and I should say that there is virtually no chance that this song has ever had anything at all to do with that country.

Mind you, nobody has come up with a definitive provenance that I can recall, so it's not impossible; just extremely unlikely. If anybody has any substantive information that has not already been posted here, I'm sure we'd all like to see it.

Malcolm