A detailed, eyewitness-style chronicle traces the onset and spread of a major urban epidemic, following reports, parish mortality registers, and neighborhood patterns as contagion moves through districts. It records public reactions, rumors, official investigations, and the authorities' containment measures—quarantines, inspections, and burial practices—while noting seasonal effects on mortality. Statistical weekly counts and local case studies illustrate how fear, displacement, and administrative choices shaped daily life, commerce, and communal responses, offering both practical detail and reflections on the social atmosphere during a devastating outbreak.