The former Blue Plaque home of American author Herman Melville, where he wrote early drafts of Mody-Dick in the late 1840s, has gone on the market for £9m. The five-bedroom, four-storey townhouse on ...

In 1854, cholera struck again. In London, Dr John Snow studied the spread of cholera in the Broad Street area. He noticed that the victims had all drank water from the pump in the street.