Referee's report by John James Rickard Macleod, on a paper 'The relation of the duodenal mucosa to the internal secretion of the pancreas' by N B Laughton and Archibald Byron Macallum Sectional Committee: Physiology Recommended for publication in the 'Proceedings of the Royal Society of London', with modifications. Sugests adding further information on the number of experiments, the controls and the preparation of the extract. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 26 January 1932. nd [January 1932]