Narrated by Robert Anstey, who is acting as Thorndykes counsel as Jervis is away in America. He walks right into a murder scene, attracted by the screams of a beautiful young woman.
There is murder, love, and a form of code to be deciphered to prove an inheritance. The plot, which is ingenious and complex, includes a contested inheritance with a fascinating history.
We watch him test for poison; take impressions of fingerprints, handprints and footprints; detect secret chambers; and interpret coded messages.