©2008
Hafan Deg was a real house, although not with that name. My son was at the University of North Wales in Bangor some years ago, and I visited him. From my room at the B & B where I stayed (approximately at the 'G' in Caergybi on the south side of the Menai Strait in the Google map), I could see this ruined house directly across the water (approximately just below the 'A' in A545). We drove over there and it was, as it is in my novel, derelict.
I haven't been back since, so I have no idea if the house was restored, turned into a hotel or a retirement home. In fact, it may well have been torn down.
The interior descriptions are mine. I leave the reader to mull over what's real, and what's fiction, in the rest of the book.