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Amgueddfa Cymru – Museum Wales
Dinorwig Quarries Notice / Chwarelau Dinowig Rhybudd. A bilingual (English on left, and Welsh on right) danger notice issued by the Dinorwig slate quarries for the safety of the workers. The sign states that blasting operations commence at 9 am, 11am, 12 noon, 12.55 pm, 3 pm and 4 pm.
