Referee's report by Nevill Francis Mott, on a paper 'The theory of the vibrations and the Roman spectrum of the diamond lattice' by Helen M J Smith Sectional committee: Physics Recommended for publication in Philosophical Transactions. No-one in the country will be competent enough to criticise the work but it seems important. If Born is satisfied with the paper, it should be accepted. [Published in Philosophical Transactions A, 1948]. Date received not given. 24 January 1948