Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Aberllefenni slate quarry, photograph
Inner Voel Chamber at Aberllefenni Slate Mine. Philip Evans. (S+ on slab indicates that it is good slate for monumental work. Arrow → indicated pillaring plane).
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.