Letter from Robert Whytlaw-Gray, on a paper 'The physical investigation of certain hygroscopic aerosols' by D W E Axford, K F Sawyer and Theodore Morris Sugden He is willing to change his recommendation that the second part of the paper should be omitted, so long as it is shortened considerably. The data not related to the main thesis should be omitted. [Published in Proceedings of the Royal Society A, 1948]. Endorsed on recto as received 2 December 1947. 1 December 1947