Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Merthyr Vale Colliery, plan
Copy of survey of part of Merthyr Vale Colliery. Scale 1/500.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Copy of survey of part of Merthyr Vale Colliery. Scale 1/500.