“…Consistent with Dr Cullen's approach, Dr Hallaran's distinction between organic and non-organic factors in the aetiology of mental illness was to consolidate the foundation for much subsequent progress in determining the causes of insanity throughout the nineteenth and twentieth centuries. Syphilis, for example, was cited as a major cause of admission to psychiatric institutions throughout nineteenth-century Europe [7,8], despite the fact that accurate diagnosis was not possible prior to the work of Wasserman [9]. Nonetheless, Dr Hallaran undertook to gather the first systematic data on the causes of psychiatric admissions in Ireland, and identified, as best he could, that venereal disease accounted for a lower proportion of admissions in Ireland [10,11].…”