Letter from William Hume-Rothery, on a paper 'The application of Boltzmann’s superposition theory to materials exhibiting reversible β flow' by C Henderson, to D C Martin, Assistant Secretary of the Royal Society Paper reference code: A174 Hume-Rothery remarks the first part of Henderson's paper is not his 'line' at all, and requests permission to discuss the paper with his colleagues, or for the paper to be sent to someone like Professor Mott. Written from Inorganic Chemistry Lab, University Museum, Oxford [England]. [Published in Proceedings A, 1951]. Endorsed on recto as received 6 November 1950. 3 November 1950