Tune No. 463 in "The Complete Petrie Collection" is essentially identical to that of Joyce's "Leprehaun."

Its title is "Come All Y'United [sic] Irishmen, and Listen unto Me."

Petrie (who died in 1866) notes that he received the tune from "Mr. [P.W.] Joyce, from J. Martin and P. Cudmore."

This was apparently the song of which Joyce, in 1873, could recall only one line: "O, my darling girl, I'll soon come back and surely marry you!" (Unless he'd heard a second song to the same tune!)

I haven't been able to find a text of the song.