Murder by the Book

On a spring morning in 1840, on an ultra-respectable Mayfair street, a household of servants awoke to discover that their gentle, unobtrusive master, Lord William Russell, was lying in bed with his throat cut so deeply that the head was almost severed.
The whole of London, from monarch to maidservants, was scandalized by the unfolding drama of such a shocking murder, but behind it was another story, a work of fiction. For when the culprit, the 23-year-old French valet, eventually confessed, he claimed his actions were the direct result of reading the best-selling crime-novel of the day. This announcement span a web which entangled the entirety of literary London, from Thackeray to Dickens, and posed the question: can a work of fiction do real harm?