Letter from Howard Walter Florey to William B Bean, University of Iowa, Iowa City Thinks Bean is probably right about statement in Journal of the American Medical Association - mouldy bread in pre-historic times to treat patients - no evidence that moulds were penicillin producing - comments on this - some might have had antiseptic action - regards Dr Richmond's case histories as nonsense - any penicillin in mouldy bread would have been destroyed in stomach. 21 August 1961