Letter from Howard Walter Florey to J H Harley Williams, Chest and Heart Association, Tavistock Square, London Difficult to fit in visit - comments on his activities - hesitates to ask Heatley to do anything as Heatley has just prepared exhibit for Royal Society Tercentenary - perhaps they could arrange something later in year - he is likely to be busy but Williams could get all he wants from Heatley for book on penicillin. 9 July 1960