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He asked no quarter of the underworld and gave none, as for four decades he ruthlessly tracked down England's greatest criminals. If Murder Is a Fine Art, To Wensley Must Go The Credit For Making Scientific Detection A Higher Art. From 1888 until he retired a few years ago, the name Frederick Porter Wensley brought terror to all England's criminals. Yet this great detective had the respect of every crook for his courage, his ability, and his absolute fairness, which raised him from the lowest post on London's Metropolitan police force to the highest position possible, Chief Constable of the Criminal Investigation Department of New Scotland Yard. No career could be more colorful or fascinating that this of the man who reorganized Scotland Yard, created the London criminals' most formidable enemy, "The Flying Squad," and appointed the "Big Four," whose cooperation and efficiency gives Scotland Yard its enviable reputation. To follow the life of this real Sherlock Holmes is to be behind the scenes in England's greatest criminal cases, to participate in the thrilling adventures that only a member of the C.I.D. could experience, and to see a master detective at work. This is a breathless, continually interesting book, through the pages of which pass an array of murderers, blackmailers, forgers and criminals, from Mahon, the butcherer of girls, to Mr. Jones, the unfortunate gentlemen who forgot and turned off the gas.