Copy letter from Robert William Frederick Harrison to Monsieur le Bibliothecaire, Ecole Normale Superieure, Paris 'Dear Sir, In answer to you application of February 1st for Proceedings [of the Royal Society] Nos. B 528 and A 522, I beg to say that we are now forwarding the Nos. in question and trust they will reach you safely. May I take the opportunity of asking you if you could kindly supply us with the following Nos.off the Annales Ecole Normale which appear not to have reached us:- No. 11, November 1906; Nos. 7, 8 & 9, July, August and September 1908.' 8 February 1909