ÁineGot it. The collection "Abair Amhrán" gives a song under the title "An Spailpín Fánach" which is clearly a trnslation of Maguire's song and intended to be sung to the same air. It states:"Proinsias Ó Maonaigh a d'aistrigh"
Carol's set is a translation of the older Irish song of that title which is not really related to the thread topic IMHO.
Regards