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Amgueddfa Cymru – Museum Wales
Full title - Lines on the Dreadful Accident Which took place at Cymmar Colliery, Rhondda Valley, Near Pontypridd, On Tuesday, July 15, 1856, When A Dreadful Explosion Of Fire Damp took place, and 114 Lives Were: Lost! Printed in black on eight sides of single folded sheet of paper. Printed in Welsh and English.
