The Priory was built for the Lockhart family of Castlehill and their family crest was carved above the main entrance and etched in every balustrade of the main staircase inside.
The building still exists, in the tiny street at the top of Castlehill on the Royal Mile, near Edinburgh Castle, and is now part of the Camera Obscura attraction.
McFall went to a boys' school, St Patrick's Secondary School (since merged with Notre Dame High School to form Our Lady & St Patrick's High School), on Hawthornhill Road in Castlehill, Dumbarton, leaving without any qualifications at 15.
One of their kings, Ailill Finn, is stated to have held residence at Dun Atha Fene, now Caorthannan/Castlehill townland, in the parish of Addergoole and Crossmolina.