Have got togethr with the archivist at Conwy records off ice - and we have found the exact lcaotion of Glan Y mor Villa.
A converyance was found from 1899 naming Abel Davies' widow Jane, their son William, his wife and their son and heir William Owen. WiO Davies' mum Margaret seemingly signed oer the property to him, and it was sold to Dr Griffiths, who married a Miss Tritton (child of owner of the Deganwy Calte Hotel).
it was used as a surgery, and was later turned into the Griffon Cafe. It is now La Paysanne!
Have also located Glan Y Mor farmhouse. It was situated next to the well marked on early maps. It is below Bryn Y Mor and before the still standing Kyle House. The location seems to be on the banking opposite the newish sheltered seating on the beach side. Google earth shows some earthworks which i fully intend to investigate when next in Deganwy. Wonder what happened to the well?
Many thanks for all the input you all gave which helped steer me in the right direction - now documented proof in hand (tithe maps, rates books, old photos from the archives).
Am so pleased that the place dearest in my heart is where my antecedents lived. No wonder the old hiraeth kicks in on an almost daily basis!