Referee's report by Ronald Aylmer Fisher, on a paper 'Contributions to the mathematical theory of epidemics. II. —The problem of endemicity' by William Ogilvy Kermack and A G McKendrick Sectional Committee: Mathematics Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests the authors clearly emphasise the limitations of the study. [Published in the 'Proceedings of the Royal Society of London' A, 1932] Endorsed on verso as received 11 May 1932. [May 1932]