Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Plan
Huey Williams' Shaft (location unknown), plan and section drawn by H.P.R., Nov 1927
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Huey Williams' Shaft (location unknown), plan and section drawn by H.P.R., Nov 1927