The problem with that, Amy, is that for most traditional songs there is no "100% correct" lyric to be found, as they have been folk-processed and mondegreened to varying degrees. Not to mention regional variations, floating verses, and the like.

The words given above in this thread purport to be the Planxty version. I don't have the record on hand to check, but I know there are differences to the Paul Brady version I'm very familiar with.