Diamonds vanish from a safe, and the only clue is a thumbprint in blood that matches young Reuben Hornby. Everyone believes fingerprints cannot lie, except Dr. John Thorndyke, medical jurist, who with his friend Jervis and his laboratory assistant Polton sets out to show how such evidence can be faked.
The 1907 debut of the great scientific detective, written to puncture blind faith in fingerprint evidence. Download the free EPUB.