Hi Les B!As Bruce O indicates above, John F. Poole, a Dubliner, wrote "Tim Finegan's Wake" (sic) in New York in the early 1860s. He fashioned it after a popular concert saloon song, "A Fine Ould Irish Gentleman."
Poole died, ultimately, from injuries sustained from falling off a ladder. Truth is stranger than fiction.
All the best,
Dan Milner