Letter from Geoffrey Ingram Taylor, on a paper 'Explosion waves and shock waves. VI. The disturbance produced by bursting diaphragms with compressed air' by William Payman and Wilfred Charles Furness Shepherd to Alfred Charles Glyn Egerton He has throught about the paper with regard to war science and has decided that there is 'just enough probability' that it will be useful to the enemy. Publication should be postponed until after the war. [Published in Proceedings of the Royal Society A, 1946]. Endorsed ob verso as received 4 May 1940. 3 May 1940