This may be thread creep, but Chapel Hill Press has just brought out a book entitled "On the Banks Of Mulroy Bay" by D. K. Wilgus and Eleanor Long-Wilgus (now both deceased).   It doesn't contain the song that this thread is about, I don't think. It deals with songs and stories about the assassination of the Third Earl of Leitrim in 1878. For a scholarly book it's a pretty good read.

Someday I'll go there.