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Amgueddfa Cymru – Museum Wales
Photocopy on white paper, with some areas coloured in pink, yellow and blue pencil. Full title: 'Foster Carbon Hearth for No.B Blast Furnace. Messrs Richard Thomas & Baldwins Ltd. Ebbw Vale' Engineers drawing by Henry Foster & Co. Ltd. Dated 8/1/47 Drawing No. E1115/1
