Part I.

A GENERAL SURVEY OF CRIME AND ITS DETECTION.

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Crime Distinguished from Law-breaking--The General Liability to Crime--Preventive Agencies--Plan of the Work--Different Types of Murders and Robberies--Crime Developed by Civilisation--The Police the Shield and Buckler of Society--Difficulty of Disappearing under Modern Conditions--The Press an Aid to the Police: the Cases of Courvoisier, Müller, and Lefroy--The Importance of Small Clues--"Man Measurement" and Finger-Prints--Strong Scents as Clues--Victims of Blind Chance: the Cases of Troppmann and Peace--Superstitions of Criminals--Dogs and other Animals as Adjuncts to the Police--Australian Blacks as Trackers: Instances of their Almost Superhuman Skill--How Criminals give themselves Away: the Murder of M. Delahache, the Stepney Murder, and other Instances--Cases in which there is Strong but not Sufficient Evidence: the Great Coram Street and Burdell Murders: the Probable Identity of "Jack the Ripper"--Undiscovered Murders: the Rupprecht, Mary Rogers, Nathan, and other Cases: Similar Cases in India: the Button Crescent Murder: the Murder of Lieutenant Roper--The Balance in Favour of the Police.....1