Referee's report by Charles Galton Darwin, on a paper 'Classical theory of mesons' by Homi Jehangir Bhabha Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Cannot follow the detail but still finds the paper worthy. Refers to work of Paul Adrien Maurice Dirac. It would be a pity if publication was delayed. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on recto as received 4 May 1939. [May 1939]