Correspondence between John Barker and the Royal Society General correspondence: a request for a photograph to add to the Society's collections, and a request for a list of Council and Officers. Letters to and from the Assistant Secretary, David Christie Martin. The original file featured the typed name and address: 'Dr. J. Barker, F.R.S., The Botany School, Downing Street, Cambridge'. 26 January 1954-10 February 1959