Dominic learned "Off to Dublin in the Green" when he was a member of Na Fianna , the boy scouts of the IRA. They sang it as a marching song. He never claimed to have written it although he may have added a verse or two. Likewise some of the other songs mentioned above were noy written by him, but were recorded or associated with him.
Hi Nick, I must fix you up some time with info on Patrick Galvin's L/Ps as I promised ages ago. Keep up the good work