Mary Kelly had picked up the name 'Marie-Jeanette' while staying in Paris. Had the latter got into some kind of trouble while staying in this city and had the killer then followed her into London's East End? The Whitechapel Murders took place over a period of a little more than two months and ended just as swiftly as they had started. Had the assailant taken the lives of his other victims so as to cover his own tracks or had it been a case of mistaken identity? In this book I make the case that a close relative of the Post-Impressionist artist Henri de Toulouse-Lautrec took the law into their own hands when they discovered the artist was dying of syphilis. Having obtained the suspect woman's name from one of Lautrec's letters to his own mother, she was finally tracked down to 13, Miller's Court.