Letter from Sidney Russ, The Rongten Society, Middlesex Hospital, London, to James Mackenzie Davidson Notes that Messrs Watson are sending a couch to the Royal Society of Arts for the meeting tomorrow evening and that he would be glad if Mackenzie Davidson could give a demonstration. Also informs Mackenzie Davidson that at a recent meeting of the Council it was revealed to invite him to become one of the Honorary Members of the [Rongten] Society. 3 March 1919