Mary Ann Cotton's prison letters sold at auction

Prison letters sent by Victorian serial killer Mary Ann Cotton have sold for £2,200 at auction. Cotton, of West Auckland, County Durham, was hanged in 1873 for the murder of her seven-year-old stepson. It is thought she was responsible for the deaths of up to 20 others, mainly by poisoning her victims. The letters, which make reference to solicitors and financial problems, were sold to a dealer at an auction in Leyburn, North Yorkshire.The correspondence was addressed to a man who had lodged at Cotton's home.