Introduction: (Mrs) Hudson's soap : reading purity in detective fiction -- A strange inverted world" : sensation and social purity in the mystery of a Hansom cab -- "Cheap, healthful literature" : the Strand magazine, purified reading communities, and fictions of crime -- A criminal man of many faces : Grant Allen and the delinquent body -- Studies in Scarlet : medicine, detection, vivisection -- Tales of the unintended : reinventing Victorian criminality -- Conclusion: the eugenics of genre
