I've heard it said that Dear Ole Dicey is credited as being the woman that broke the "men only" rule in Dublin pubs. I don't know the truth of it, but it does offer an explanation of the "heart of the rowl" phrasing if "rowl" is the Dub pronunciation for "row", as in "a row and a ruction". A lady of the street, fronting for her genteel sisters, could be expected to cause a bit of a stir. Whatever the "correct" answer might be, it's a great song that even audiences not well versed in Dublin lore seem to thoroughly enjoy.