The Secret of Chimneys

The council chambers at Chimneys, the Brent family estate, holds a dark and intriguing secret and someone will stop at nothing to prevent the monarchy being restored in faraway Herzoslovakia.
A young drifter finds more than he bargained for when he agrees to deliver a parcel to an English country estate. Little did Anthony Cade suspect that a simple errand on behalf of a friend would make him the centrepiece of a murderous international conspiracy. A sinister plot rife with diamonds, oil concessions, exiled royalty, an elusive master criminal and the combined forces of Scotland Yard and the French S ret .
"There is more than murder in this story; there is a treasure hunt in it, not for gold but a diamond, and the story is suitably staged for the main part at Chimneys, that historic mansion whose secret will be found."
TIMES LITERARY SUPPLEMENT