Letter from R H Balme, Medical Unit, London Hospital, Whitechapel to Howard Walter Florey Says Denys Jennings advised him to write - is working with Jennings on peptic ulcers - wonders if there are antigens in Brunner glands or their secretion which could be used to produce an antiserum and if attempts have been made to produce selective damage to Brunner glands in this way - possible way of producing duodenal ulcer - does not propose to start work on these lines. 12 January 1956