By 1700 London was the largest city in the world, with over 500,000 inhabitants. Very weakly policed, its streets saw regular outbreaks of rioting by a mob easily stirred by economic grievances, politics or religion. If the mob vented its anger more often on property than people, eighteenth-century Londoners frequently came to blows over personal disputes. In a society where men and women were quick to defend their honour, slanging matches easily...