The Mouthpiece

This is a crime mystery novel that revolves around the inheritance of an English heiress. A colonel, an ex-Dartmoor convict, and a lawyer plan to swindle the English heiress of her inheritance through a deed of a marriage settlement. The heiress is to sign away her inheritance to which she is entitled but which will pass to her mother in the event of her dying unmarried. Murder and kidnapping are planned. Will the heiress lose her fortune to the colonel?