Letter from Howard Walter Florey to J C Gregory, Medical Department, Oxford University Press, Warwick Square, London Understands Gregory is to recast Volume 1 - Penicillin (The Clinical Application of Antibiotics), published in 1952 - comments on volume 2 to cover streptomycin and other antibiotics active in tuberculosis - volume 3 is the one just published - volume 4 will be on less widely used antibiotics, with section on choice of antibiotic - would like to have manuscript of volume 4 returned with comments, so his wife can revise this - does not know when revision will be complete. 3 September 1957