re: your certainty... well hopefully he's the correct one? There were other Michaels whose births we may never find....That one was lucky as it was R.C. / proceed at your own risk ( see my little quote at the bottom of my replies...)
re: wandering into Ireland...
Without parent's names- the Parish they came from?? ?? Without early census we don't even have ages for Patrick & Catherine...
Re: Hanley I noted there were some as well, although it is a common name...It would not have been impossible for the lad to return for a visit and meet & marry a gal...but you'll need to find the marriage to prove it...