Letter from Howard Walter Florey to R C Curran, Pathology Department, St Thomas's Hospital Medical School, London Does not think photographs of endothelial cells with ferritin molecules are very good and would not want them shown - comments on work on transport through endothelium - refers to paper by Palade on passage of ferritin molecules through renal capillaries - should like to visit Curran's department but is very busy at present. 17 September 1960