Early one morning, late in July, the villagers of ‘crack-brained Brensham’ woke to a remarkable spectacle. There amid the customary colours of furze and wheat was a seven-acre field that ‘had suddenly become tinctured with the colour of Mediterranean skies’. Nothing like it had ever happened before, so that the villagers caught their breath at the sight of this miracle: a great, vivid patch of cerulean ‘so clear and pure that it made one think of eyes or skies’ . . .