This study is part of an investigation into the physical and mental status of a small series of patients with duodenal ulcer undertaken at Guy's Hospital. Each patient in this series had a routine biophysical and biochemical investigation, a clinical interview and the Rorschach test. In addition, information about the patient was gained from other sources, such as his relatives and employer, and his behaviour while in hospital was kept under review. In a majority of the patients examined, phases of activity of the ulcer dyspepsia were correlated in time with crises in the patient's personal life. The Rorschach patterns from the records of these patients are presented here for comparison with those found in other disorders, and for the assessment of certain features common to this series.