Mystery writer Harriet Vane, now cleared of murder at the Old Bailey, goes on a walking tour of the West Country and stumbles across a corpse.
The corpse on the rock - murder or suicide. Harriet and Lord Peter believe the evidence points to murder.
The police intensify their search for witnesses in the case of the murdered gigolo, found with his throat cut on a rock in Cornwall.
With the aid of an encoded letter found on the dead man's body, Lord Peter and Harriet solve the mystery.
clarasiller last seen Sep 21, 2017