Capturing the mood of the English landscape: the genius of John Nash

‘If I wanted to make a foreigner understand the mood of a typical English landscape,’ the art critic Eric Newton wrote in April 1939, ‘I would first show him a good Constable and then one or two of John Nash’s best watercolours.’ This is about as good an endorsement any painter could ask for, but Nash is more usually bracketed with, and overshadowed by, his older brother.