Letter from John David Griffith Davies, to Herbert John Gough, regarding a paper 'The phosphorescence of various solids' by John Turton Randall and Maurice Hugh Frederick Wilkins Sectional Committee: Physics Encloses paper. Alfred Charles Glyn Egerton requests his opinion as to whether the paper can 'be safely published as not containing information likely to be of use to the enemy'. [Published in the 'Proceedings of the Royal Society of London'] No received date. 24 January 1940