The problem I have is access to records. I can only buy transcriptions that have been done by the CFHS. They have not transcribed all the parish records.

Although I know that the Flintshire archives has microfiche of baptisms, marriages and burials for Holywell etc I have not been able to discover whether I can buy microfiche from them. They have all the transcribed copies so far done by the CFHS, which of course do not include the burials for the period I am looking for.
I also have a problm with respect to Llandrillo. Which one? I only have the census records to go by and these say Mary's PoB was Llandrillo, Denbighsire. I had assume it was Llandrillo yn Rhos as this is close to Llandudno, but there is also a Llandrillo south of Corwen.

It just doesn't get any easier does it?

FWIW, the death cert I received for William JONES of Well Street, Holywell, recorded the informant as George JONES of Greenfield. This JONES line isn't mine but might be of use to someone else.