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Unseen letters from Britain's first female serial killer Mary Ann Cotton written days before she was hanged - Mirror Online
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Stream episode Serial Killer: Mary Ann Cotton (The Black Widow) by SKD podcast | Listen online for free on SoundCloud
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Mary Ann Cotton - Dark Angel: Britain's First Female Serial Killer: 9781473876200: Connolly, Martin: Books - Amazon.com
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Dark Angel: How were the real Mary Ann Cotton's terrible crimes uncovered? From arrest to trial to hanging. ITV, PBS Masterpiece and BBC First | Radio Times
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Victorian serial killer Mary Ann Cotton is set to shock viewers in ITV's new drama | Daily Mail Online
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