In a clinic characterized by a large percentage of digestive disturbances, I have found it easy to distinguish a certain number in which the symptoms were due to gastric or duodenal ulcer. This statement I make, because in all cases in which operation has been performed on this diagnosis, I have demonstrated the ulcer on the table. The following case is reported because of the definiteness and simplicity of the symptoms, their difference from the symptoms of the more usual conditions, and their complete explanation by the pathologic findings at operation. These last may be briefly described as narrowing of the pylorus and diverticulum of the stomach caused by stretching of its wall, the whole being due to the scar of an old ulcer completely healed. History. —A. B., aged 56, fisherman (Hosp. No. 457), was subject to indigestion for some years but two years ago began to have severe