Presented by Michael Oliver How Rusalka ' Became Czech: John Tyrrell examines national elements in Dvorak's opera. On Playing the Bach Cello Suites: a conversation with Ralph Kirshbaum. Repertoire for Singers: Simon Carrington and Alastair Hume discuss the King's Singers' commissioning policy. Letters of a Creative Life: Robert Anderson reviews two volumes of Elgar's correspondence with his publishers. Producer ANDREW LYLE