Hi Hugo,
I think I may have found who was on Pernsarn Farm in 1968 It had to be a Davies looking at it now my Dads cousin, not a maria but mary also my dad said about his cousin been buried Saint Tudno Church Cemetery Llandudno been looking and maybe think this could be her.
Name Mary Davies Birth Date1893 Date1968 Cemetery NameSaint Tudno Church Cemetery Llandudno I need to do a little more digging I think