Referee's report by Nevill Francis Mott, on a paper 'A symptotic formulae relating to the physical theory of crystals' by Walter Ledermann Sectional Committee: Physics No clear opinion regarding publication in the 'Proceedings of the Royal Society of London'. The subject is very specific, but should be published somewhere. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies no. [Published in the 'Proceedings of the Royal Society of London'] No received date. 6 August 1943