Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Aberllefenni slate quarry, photograph
Inner Voel Chamber at Aberllefenni Slate Mine. Looking down from the top into the inner voel chamber (Wally Simmonds estimated it had taken between 20 and 30 years work to reach this depth.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.