Norman G Heatley to J C Woodruff, Merck and Co Inc, Rahway, New Jersey Has given penicillin to Florey - discusses information he may give to Florey about Merck's work - chance of cooperation of ICI and the TRC on penicillin work - some interesting progress made at Oxford - gives outline of extraction process and assay technique used at Oxford - says there is a rumour that Burroughs Wellcome have applied for patents for a culture medium and for stages of the extraction process - have studied several naturally occurring bacterial inhibitors at Oxford - gives list of classes of information he will give to Florey when Mercks is agreeable. 21 July 1942