Copy letter from Robert William Frederick Harrison to Professor B [Bertram] Hopkinson FRS 'Dear Sir, In reply to your letter of yesterday, I return herewith the MS of the paper by Sir R [Robert] A [Abbott] Hadfield and yourself, together with the figures and plates illustrating it. The paper is returned to you on the understand that it is to be considered as not having been communicated to the Society at all.' 21 July 1910