JMS Pearce East Yorks, UK   Fig 1.  Sir Geoffrey Langdon Keynes. Reproduction after a pencil drawing by G. Shaw, 1957. Credit: Wellcome Collection.  (CC BY 4.0) Mention the name Keynes in Britain and most people think of the Buckinghamshire town Milton Keynes or the celebrated twentieth-century economist John Maynard Keynes. In the thirteenth century…