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Amgueddfa Cymru – Museum Wales
Graph and cover memo attached with a paperclip. Graph containing information relating to high top pressure blowing. Photocopy/ photographic photocopy?? on white paper. Also a memo to W.E. Simons (blast furnace dept.) re. the graph, typed in black ink on headed paper (Guest Keen Baldwins Iron & Steel Co. Ltd., East Moors Works).
