1926. There is only one way to put down the present revolt of the underworld. The criminal must be apprehended and punished. Punishment swift and ruthless will wipe it out. But before the criminal can be punished, he must be determined. So writes the author of this work on scientific criminal investigation. Contents: Scotland Yard Method of Solving Criminal Mysteries; French Methods of Criminal Investigation; German Science of Crime Detection; Austrian Criminal Investigation; Details of Italian Criminal Procedure; Swiss Methods of Preserving Evidence; Old Russian Police System; Unsystematic American Methods; Methods of Professional Criminals; Bank Looting; Science the Forger; Bloodstains; Secret Ciphers; Codes and Signs of the Underworld; The Study of Footprints: The Bare Foot; and The Study of Footprints: The Shod Foot.