Letter from William Payman, on his paper with Wilfred Charles Furness Shepherd 'Explosion waves and shock waves. VI. The disturbance produced by bursting diaphragms with compressed air' to J D Griffith Davies, Assistant Secretary of the Royal Society He has received the report about his paper and believes that further verification would be valuable. He would welcome the opportunity of communicating with the referee directly. He has received approval from the Safety in Mines Research Board. He will send a formal statement that it contains nothing of value to the enemy. [Published in Proceedings of the Royal Society A, 1940]. Endorsed on recto as received 9 May 1940. 8 May 1940