Glan y Mor farmhouse was on the shore line directly south west of Platt House, and below the marking of Bryn Y Mor - there was also a well there.
In todays context it would be opposite the covered seating area on the shoreline, between the pathway from the iron bridge and Kyle House.
Hope this helps!
Have tried to enlarge the map without success so far - do we have any expert techno's that can assist?