Memorandum for Mr Davies for Miss Boatwright, regarding two papers 'Supersonic dispersion in gases II. Air containing water vapour' by M Mokhtar and E G Richardson, and 'The air wave surrounding an expanding sphere' by Geoffrey Ingram Taylor Sectional Committee: Physics When the papers were sent out to Government Departments, which 'was the cause of much secrecy and excitement', lists were kept for tracking which papers had been sent to which Departments. The RAE has a cross through it, indicating that the papers were sent there. 'I recollect a scene of many offprints decorating the floor of the 'Publications' office'. [Published in the 'Proceedings of the Royal Society of London'] No received date. 19 July 1941