Referee's report by Sidney Harris Cox Martin, on the Croonian Lecture 'Immunity with special reference to cell life' by Paul Ehrlich Sectional committee: Physiology Recommended for publication in full with the illustrations accompanying the paper. The paper is a good exposition of Ehrlich's work and theories on immunity. Experimental data might be added to it, but this would entail such extensive additions as to make the paper a book. The paper had better be published as it stands in English. [Published in Proceedings of the Royal Society, 1899]. Endorsed on verso as received 9 May 1900. 8 May 1900