Letter from Sir William Lawrence Bragg to D C Martin, on a paper 'The infra-red spectra of some optically active and meso synthetic polypeptides' by A Elliott, to David Christie Martin, the Royal Society Paper reference code: A163 Believes the paper could be published as it stands, but suggests the Society may want to seek the opinion of an expert on infra red spectra. [Published in Proceedings A, 1954]. Received 29 July 1953 28 July 1953