Referee's report by Ronald George Wreyford Norrish, on a paper 'The theory of the photolysis of silver bromide and the photographic latent image' by R W Gurney and Nevill Francis Mott Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Notes some minor errata. Some of the assumptions are uncertain, but present the best picture yet produced and a valuable working hypothesis. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 12 November 1937. [November 1937]