Letter from Howard Walter Florey to (J W) Legge, Biochemistry Dept, Melbourne University Quotes report of American who has been working on Legge's preparations of secretin, giving summary of findings in experiments on duodenum and pancreas of cats and remarks about the two preparations used, AP 27.10.49 and SB1 - still investigating these hormones - hopes to find something of interest. [with notes of experiments]. 18 March 1955