Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
O.S. map of Caernarvonshire
Ordnance Survey map section (photocopy) (not dated) Pant Dreiniog Slate Quarry, Penrhyn Slate Quarries (Bethesda) Scale - 1 : 25000 3 copies
Pwnc
Diwydiant
Rhif yr Eitem
88.86I/13 (33 - 35)
Historical Associations
Association Type: Slate quarries
Lle: Penrhyn slate quarry
Association Type: Place name
Lle: Bethesda
Derbyniad
collected officially, 1988
Mesuriadau
Meithder
(mm): 457
Lled
(mm): 255
Deunydd
papur
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.