Referee's report by George Udny Yule, on a paper 'A contribution to the mathematical theory of epidemics' by William Ogilvy Kermack and A G McKendrick Sectional committee: Mathematics Recommended for publication in Proceedings, in full. His report is 'not of much value' as as the paper is a bit over his head. However, the paper seems to draw some interesting conclusions. [Published in Proceedings of the Royal Society A, 1927]. Endorsed on verso as received 25 May 1927. May 1927