Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Alfred William] Porter, FRS Refers to a paper by J. J. Guest, 'Graphics with four variables with considerations upon the solution of cubics', that Professor [Alfred William] Porter communicated to the Society. Informs Professor Porter that it has been under consideration by a Committee who have decided it is not suitable for publication by the Society. Asks if Professor Porter wishes to withdraw the paper. 20 June 1919