Correspondence from W.J.G. Beynon and others to Edward Appleton, dated 1957. The material relates to the programme and arrangements for the M.C.I. [Mixed Commission on the Ionosphere] meeting in New York, in September that year and on the general theme 'The global morphology of the ionosphere', and also on suggestions for re-organisation of the U.R.S.I. [Union Radio-Scientifique Internationale] Joint Commissions. It includes a typescript copy of Appleton's 'National Report to Commission III'.