Thanks Fred, great to track down the tune so quickly. The song is a piss take, written as an attack on O'Duffy by DIARMUID FITZPATRICK, a communist opponent of Duffy's. The original eight verse ballad was reduced to four verses, either in the course of oral transmission or by Brenadan Behan who used it in his play Richard's Cork Leg, in which Ronnie Drew performed the song.

At the bottom of a Mudcat thread HERE,is probabably more about this song than many would wish to know ( but not you I would think).

Thanks, Geoff Lawes