Letter from Howard Walter Florey to F H K Green, Medical Research Council, Old Queen Street, London Suggested National Research Development Corporation should refer question of clinical trials of cephalosporin P to the MRC - in view of widespread occurance of staphylococci resistant to antibiotics, might be worthwhile to organise trial - is enclosing reprint - does not know if there is cross resistance with erythromycin - hopes Green enjoys his new post with Wellcome Trust. 7 June 1955