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Amgueddfa Cymru – Museum Wales
Black print on white paper with typed details in blue ink. Letter from the Monmouthshire and South Wales Coal Owners Association, Cardiff to Thomas Williams & Sons, Llangennech re. workmen on strike at Pwllbach Collieries Co's Tirbach Colliery and the Gwauncae Gurwen Collieries Co's Old & New pits. Dated May 6, 1902.
