I have the song on a tape somewhere, it seems that I have tried to transcribe it before. I will dig it out this weekend and get the lyrics as best I can for you.Brack, the song is indeed called The Irish Brigade, and it is about the Irish Brigade (one of many) that fought for King Louis. I will get it done this weekend. It is a great tune, and has a great Uillean pipe fill in it.
All the best,
Mick