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Amgueddfa Cymru – Museum Wales
Typed in black ink on off-white paper. Some details handwritten in pencil. Signed in blue ink. The South Wales Institute of Engineers headed paper. A letter addressed to Mr E.Ivor David, form M.Price of the South Wales Institute of Engineers, forwarding a copy of "Skip Winding and Mechanised Mining Electrically". Dated 6th April 1937. Loose within beige/light brown card file containing information relating to Powell Duffryn Ltd.
