Erwin Blumenfeld, Lydia Davis, Nigel Kennedy's Cultural Exchange

With John Wilson.Berlin-born photographer Erwin Blumenfeld (1897-1969) was one of the most internationally sought-after portrait and fashion photographers in the 1940s and 1950s. America's leading magazines, including Vogue and Harper's Bazaar, hired him for his imaginative and highly individual shots. Erwin's grandson Remy and critic Joanna Pitman assess his legacy as a new exhibition Blumenfeld Studio: New York, 1941-1960 opens.Lydia Davis won The Man Booker International Prize last night for a career which includes a novel, translations of Proust and Flaubert and a large repertoire of very short stories, some only one sentence long. She explains how momentary observations inspire her work, including something she spotted on the London Underground yesterday.For Cultural Exchange, in which leading creative minds reflect on a favourite cultural experience, violinist Nigel Kennedy selects Black and Blue, by Louis Armstrong.John Constable's renowned landscape painting Salisbury Cathedral from the Meadows has been bought for the nation at a price of £23.1m - a record figure for a work by Constable. Art reviewer William Feaver reflects on the painting's worth, and looks back at how it was received when first exhibited in 1831. Producer Jerome Weatherald.