Steve, Harlow gives the text and tune of a unique ribald song called "The Priest and the Nuns," which is set in Austria and has a very German-sounding tune and lyrics that may have been translated from some Continental source. I haven't seen it elsewhere.

He notes that he doubts "very much whether *this* song was ever in print, but it was a popular pumping chantey in early days."

That seems to imply that he heard it himself aboard Akbar in 1876-77, but his information is just as likely to be second-hand.