The sheet music can be seen in Indiana University's "IN Harmony" collection:

THE IRISHMANS SHANTY: A Favorite Comic Song, With Imitations, as sung by Matt Peel.
Albany: E. Hobart & Co. ©1859.

Fred McCormick: I hope you will find some comfort in knowing that the original lyrics are inoffensive (unless you are offended by frank descriptions people of very modest means), and that in the original, Paddy is described as free, proud, loving, and generous.