I've now looked at the version in the Sam Henry papers (dated 1945) and the one in the recently published "Traditional Songs of the North of Ireland." They add nothing to the words linked by Joe but remind me that the song has been ascribed to the Barney Conway who is named in it. Sam Henry's correspondent named the tune as "Cod Liver Oil" - another one is given in "Trad songs of the N of Ireland"

The "big motor cars" of the text give a guide to the approximate date - late enough for motor cars to be taken for granted but not common. Cars would have been uncommon during the 1939-1945 war and in any case not used for such frivolity. I'm firmly of the opinion late twenties to mid thirties and more likely the latter.