Copy letter from Robert William Frederick Harrison to Professor E [Ernest] H [Howard] Griffiths, Fellow of the Royal Society 'Dear Sir, In reply to your letter of January 9, the Subject Index, Pure Mathematics, Vol. I, was published by the Cambridge University Press, Fetter Lane, EC, and the sale is entirely in their hands. The prices of issue were, in buckram, 21/1 net, in half pigskin, 27/- net.' 13 January 1909