I can see that my wording could have been better - I tend just to type it in as I think it rather than compose. What I should also have said was that songs with specific Irish references are included regardless of authorship, such as Eric Bogle's "Plastic Paddy" and "My Youngest Son Came Home Today". It's a very mixed bag - because I was very unselective there are a few Orange songs in there, though heavily outnumbered by "rebel" songs.