Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Slate The Penrhyn Quarry (booklet)
24 pages : 18 black and white photographs and 2 pull-out black and white photographs.
Content summary : history of Penrhyn,
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.