Copy letter from Robert William Frederick Harrison, to Monsieur J Morosov, Samola, Wiborg, Finland 'Dear Sir, I have to acknowledge receipt of your letter of the 13th November and the accompanying manuscript entitled "Postulat d'Euclide". It is a strict rule that all papers intended for reading before the Royal Society must come "communicated" by a Fellow of the Society. Your paper does not comply with that regulation, and I have, therefore, to return it to you herewith (by registered book post). I am, yours faithfully, Robt Harrison Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 18 December 1896