Butler in the song owned Castle Crine !

Said Butler to Boland: "I
Will commit you back again."
Said Boland to Butler:
"Pray what have I done,
But the beating of Mr. Heckman,
And the taking of his gun?"

and Martin Ryan's find fits the song well

William Butler, of Rossroe Castle, County Clare, a lawyer by profession, acquired much of the Castle Crine estate through purchase from families such as the Burtons, Westbyus, McDonnells, O'Briens and Lysaghts.
He had two sons: Henry Butler of Rossroe, and Thomas Butler of Castlecrine. The said Thomas had a son, WILLIAM BUTLER, of Castlecrine, who inherited the estate of his uncle, Henry Butler, of O'Brien's Castle, in 1791. His eldest son, JAMES BUTLER, of Castle Crine, died in 1820 and was succeeded by his son, HENRY BUTLER, a Deputy Lieutenant for County Clare, as was also the latter's son and heir.

So probably Henry Butler had Johnny Boland transported ! in the 1840s !