In 1798, during the revolutionary wars on the European mainland, the Irish rebelled. Though they were supported militarily by the French Republic, it was the ideas heralded by the Revolution that gave real strength to their cause. A decade later, in Dublin, William Hallaran argued in his An Enquiry Into the Causes Producing the Extraordinary Addition to the Number of Insane that much of the increase should be attributed to the rebellion. Fifteen per cent of cases where causes could be identified were linked directly with the rebellion, but its effects were writ large in the rest of the catalogue: loss of property, drunkenness, religious zeal, disappointment, and grief.