Keywords: Mary Ann Cotton.jpg en Mary Ann Cotton October 1832 “ 24 March 1873 was an English serial killer believed to have murdered up to 20 people mainly by arsenic poisoning Scan of contemporary photograph \the ledgeand ca 1870 PD-Art Serial killers People executed for murder 1832 births People of Tyne and Wear 1873 deaths United Kingdom in the 19th century |