|Died||11 October 1870 (aged 34–35)|
|Cause of death||Execution|
Margaret Waters, otherwise known as Willis, was an English serial killer hanged by executioner William Calcraft on 11 October 1870 at Horsemonger Lane Gaol (also known as Surrey County Gaol) in London.
Waters drugged and starved the infants in her care and is believed to have killed at least 19 children. Charged with five counts of wilful murder as well as neglect and conspiracy, Waters was convicted of murdering an infant named John Walter Cowen. Her sister, Sarah Ellis, was convicted in the same case for obtaining money under false pretences and sentenced to eighteen months' hard labour.
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