Hi
As I said to you in PM, had been to Cemetery but failed to find the grave. There is a small Baptist cemetery in Garndolbenmaen with just a few graves, you have to climb a wall to get into it so I only looked at the ones near enough to read from outside.
Been to Caernarfon this afternoon and looked at microfiche copy of the MIs for both. Ellen is buried in the parish church (Santes Fair) situated as described by 'nestagj'. There is a plan of the cemetery; I'll call there again and hopefully find the grave.
The inscription only refers to the burial of Ellen - roughly translates:
In loving memory of Ellen Roberts, dear spouse of Robert Roberts, Bron Marlwyd, Garn, who died 10th of February 1902, aged 73 yrs.
The death date 10th might be a mistranscription.
Do you know the name and death/burial details of his first wife ?
Emyr