James Carter draped his jacket around Harriet’s shoulders, he could see she was still trembling at the sight of the two bloody shrouds of Rene de Pont and Emile Martinus as they were bundled into the back of the ambulance.

Inspector Cosgrove had finished taking the last of his statements when Agatha asked. “So, Inspector what was it that persuaded you that it was de Pont who killed Thomas?”

“The letter this morning from Mr Huntly-Smythe.”

As if on...