Has there been any further progress on this?
I am also searching for a Brookhouse resident, William Jones b.1842.
Genuki correctly states that Llanrhaiadr Parish came under Ruthin but then goes on to say that the parish was reduced a lot in the 19th century - so it may have changed.
There is some confusion in the GRO transcripts for the records I was looking at, 4/5 Williams in that quarter, so I phoned the Ruthin Register Office to find out whether it would be possible to go there and check.
The lady was very helpful, asked who I was looking for, found the records, confirmed that one was for William son of John & Ann from Brookhouse and let me order it over the phone.
That was a service that I didn't know about.
Dave