Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Merthyr Vale Colliery, plan
"Copy of a tracing taken from plan of Merthyr-Vale underground workings". Scale two chains to an inch. Dated 28th January 1882.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.