Letter from F N Lloyd Williams, Head of School Broadcasting, BBC, Broadcasting House, London to Howard Walter Florey Have recast script, 'The story of penicillin', not in way which would satisfy the scientist but so as to avoid impersonation of Florey and N G Heatley - hopes Florey will some day expound the story himself - comments on this - is enclosing pamphlet about new science series for children aged 9 to 11. 30 March 1961