Referee's report by Harold Jeffreys, on a paper 'On maintained convective motion in a fluid heated from below' by Anne Pellew and Richard Vynne Southwell Sectional committee: Mathematics Recommended for publication. The opening sentence is unfortunate and should be changed. Some modifications A reference to A R Low should be made. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies no. [Published in Proceedings of the Royal Society A, 1940]. Endorsed on verso as received 15 July 1940. July 1940