Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Merthyr Vale Colliery, document
Table charting the distances between seams in yards at Merthyr Vale Colliery.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Table charting the distances between seams in yards at Merthyr Vale Colliery.