I've enclosed below an image of the marriage from the St. Mark's parish register for the marriage of Francis Hill and Sarah Cadell (nee Hollis), also attached is a copy of the corresponding entry in civil marriage register for the same marriage - both from the free IrishGeneaolgy website
I found no sign of a Charles Hill cabinetmaker in Thom's 1848 directory, he may have been an employee rather than running his own business. In the same 1848 directory the address at 6 George's Quay is listed as Matthew Ryder builder & herring dealer, possibly your Charles, or his son Francis, rented some space 'over the shop, from this Matthew for a residence, possibly also for work.
Similarly with George Hollis, no sign of him in directory listed around 1849 - could he have been deceased by 1848, of maybe not a resident of Dublin city ?
Most of the surviving Church of Ireland records for Dublin city are available on the free IrishGenealogy website -
I had a quick look but did no see any sign of a likely baptism for Francis. Many people moved to Dublin city and suburbs
over the years, so it's possible the family did not live in Dublin city when he was born. Have you located Francis Hill on any of the English census returns - what does he give as his place of Birth ?
St. Mark's Church of Ireland was on Pearse St. formerly Great Brunswick Street, it's still used as a church but not part of the Church of Ireland. The Church of Ireland records for St. MNark's go back to the 1830s, and are included on the free IrishGenealogy website, but I have not been able to locate any other records for this Hill/Hollis/Caddell family in these..
The Sarah Burrow marriage seem to have been in Liverpool.. based on a possible 1861 census match for the family
she seems to have been born 'Dublin'
In your graphic you mentioned some Hill relatives staying in Dublin and a possible connection to a jewellery shop -
do you know if this a male Hill descendant, or could it be through a female line ?