Copy letter from Herbert Rix, to Major P Cardew, Royal Engineers, Electrical Standards Department, Board of Trade, Whitehall There is no objection to Cardew re-publishing the paper by himself and Major Bagnold provided due acknowledgement is made of its prior publication by the Society. Cardew can copy the diagrams or the Society can let him have clichés at Cardews' expense. 18 December 1894