Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons, 45, 46 and 47 St Martin's Lane, London, W.C. 'Dear Sirs, In reply to your letter I should have written before to say that I have submitted your question to the Officers of the Society, and they agree, in the opinion I had previously expressed, that the discount terms of 15 per cent must apply to the subscriptions for the proceedings [of the Royal Society] equally with the ordinary account sales. I am, yours faithfully, Robt [Robert] Harrison'. 13 February 1906