Referee's report by Meredith Gwynne Evans, on a paper 'The molecular orbital theory of chemical valency. IX. The interaction of paired electrons in chemical bonds' by Sir John Lennard-Jones and J A Pople Sectional committee: Chemistry Paper reference code: A155 Recommended for publication in the Proceedings. Evans comments: 'This paper is one of a series which I think is presenting a very useful concept, especially for chemists. I would like to suggest that when Sir John Lennard-Jones returns from America, he be asked to give a summarizing discussion before the Society'. [Published in Proceedings A, 1951]. Date received not given. 8 August 1951