Disgrifiad
Level 2 photographic building record report entitled, "Building 54 and 54a: Pen Yr Orsedd Slate Quarry, Nantlle". The report was prepared for Welsh Slate by Gwynedd Archaeological Trust, GAT Project No. 2071. Report number 835.
Cofnod Casglu
GAT - Gwynedd Archaeological Trust Reports
Cyfrwng
Graphic, Photo, Cartographic, Text.
Cychwynnwr
Ms Tanya Berks, Gwynedd Archaeological Trust
