Upon very light research, it seems very possible that who ever wrote this song was alluding to the kingfisher irish dance style, rather than a music piece.
While it doesn't explicitly say its a dance, 4 hours of a dance is sure to cripple your body. I feel like the most realistic story is that it is a piece lost to time, but equally possible a writer got a bit funky with his lyrics to make it fit in the verse.