We employed a case-control study design to investigate whether schizophrenic patients differed from non-psychotic psychiatric patients in terms of place of birth and paternal occupation. "Cases" were first-contact schizophrenic patients ascertained from the Camberwell Cumulative Psychiatric Case Register. "Controls" were the next (non-psychotic) patient on the Register matched for age and sex. In comparison with controls, cases were more likely to have: (1) been born in the deprived inner-city Camberwell catchment area (odds ratio 2.3), and (2) had fathers who had "manual" as opposed to "non-manual" occupations (odds ratio 2.1). The results were compatible with the notion that socio-economic deprivation during gestation and early life predisposes to later schizophrenia.