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Amgueddfa Cymru – Museum Wales
Black and white photograph showing large group of miners on underground railway. Caption "The Welsh Miners' Underground Railway. Miners travelling through a two mile tunnel driven between Bwllfa Colliery, near Aberdare and the modern pit at Maerdy. Its quicker by train as the surface transport route is three miles longer. Dated 9 March 1962. Detailed information typed on slip of paper attached to reverse.
