Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Sketch plan of Penrhyn slate quarry
Sketch is drawn in pencil on lined note paper. Title at top left reads 'Rough Bird's Eye View of Quarry Freehand PeraRockman'. Folded in half.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.