1. (Winding houses - incline). [Site 'O' on location map].
2. Part of Dorothea Slate Quarry complex (Nprn40539), first depicted on 3rd ed. OS County series (Caernarvon. XXI.9 1916) associated with:
Inclined plane (Nprn40544).
RCAHMW AP945127/52-5; 945128/56-61
J.Wiles 17.06.04