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Typed in black ink on white paper. Escher Wyss Ltd. headed paper, which is printed in black ink. Signed and stamped by the London Escher Wyss Limited London Technical Office. A letter adressed to E.Ivor David at Powell Duffryn House, from Escher Wyss Ltd. replying to a letter (see 83.184I/62 (6)) regarding the turbo alternators at Middle Duffryn Power Station. Dated 22th December 1952, and signed in blue ink. Loose within pink/peach card file with other documents relating to Middle Duffryn and Bargoed High Pressure Station.
