RootsChat.Com

With the usual health warning about the accuracy of online trees, note that there are several of them on the "Ancestry" website, citing Mogue (Aidan-Moses) Quirke and Catherine (Kate) Cullen as the parents.  But in line with that health warning, you would need to do your own validation of the extensive information in them, before accepting same.

https://www.irishgenealogy.ie/ civil births, marriages and deaths all free from start of registration up to the usual 100,75,50 year privacy cut-off  (approx) with register images - all that's not included is deaths from 1864 to 1870

The only qualification I would add is that records post partition in 1921 for counties Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone should instead be sought on the website of the General Register Office Northern Ireland (GRONI). Unlike the "irishgenealogy" website, GRONI records are pay to view.  The same sort of privacy rules apply to their availability online.

https://www.nidirect.gov.uk/services/go-groni-online

Almost all of the several hundred Ulster newspaper references I can see to Lower Grosvenor Street are to the street at the SE corner of Grosvenor Square in London and these peter out after the 1860s (presumably when the London street became just Grosvenor Street).

There are literally only a handful of newspaper references to Lower Grosvenor Street relating to Belfast, probing a couple of these further, I discovered that one wasn't so much stating a Belfast street name as it was indicating an area at one end of Grosvenor Street, ie. the Lower Grosvenor Street area of Belfast and the second was a mistake, namely someone with the distinctive name of Robert Conroy of 28 Lower Grosvenor Street in an 1897 newspaper item, whom I was able to readily find at 28 Little Grosvenor Street in a contemporary street directory.

It's not something that I'm 100% about, so I'll rely on others to keep me right, but my understanding of Ireland in that era is that a mixed marriage required Papal Dispensation otherwise it wasn't considered valid from the RC Church perspective ... unless the other party first converted to Catholicism (ie. 'problem' solved).

A record of the proceedings of a Regimental Board (dated 26 March 1868) to verify and record the service, conduct, character and cause of discharge of 1439 (scored out and replaced with 3169) Sergeant William Brunkard states that this William Brunkard was discharged (to pension) at his own request on completion of 21 years service,  7 1/2 years of which was in New Zealand.  It also states that he was a weaver born in the parish of Kilmore near the town of Portadown in County Armagh, he attested for the Royal Artillery at Lisburn on 18 February 1847 when he was 20, his intended place of residence on discharge was Auckland, New Zealand.