Part four of a series on the history of Jack the Ripper, a renowned serial killer investigated during the Whitechapel murders of East London in 1888.

Part 4 - The Whitechapel Vigilance Committee receive a letter from the Ripper entitled "From Hell", the package includes half a kidney preserved in wine. Jack then concludes his killing spree with one last act of extreme brutality against a young woman of Whitechapel, Mary Kelly.

For more extensive show notes, including maps, links and scripts, visit http://darkhistories.com