This puzzling plot is related by two different characters: messenger boy Jasper Gray, who experiences several strange adventures, and Dr Jervis, friend of Dr Thorndyke. Dr Thorndyke is investigating a terrible crime, the solving of which remains elusive because of key facts remaining unknown. He needs the facts to confirm his case: Jasper could complete the blank spaces if only Thorndyke were aware of his existence ........ London: 1960s:

This is the story of what, after the the French revolution, became known as the Reign of Terror or The Terror (French: la Terreur) is the label given by some historians to a period during the French Revolution. Several historians consider the "reign of terror" to have begun in 1793, placing the starting date at either 5 September, June or March (birth of the Revolutionary Tribunal), while some consider it to have begun in September 1792 (September Massacres), or even July 1789 (when the first decapitations took place), but there is a general consensus that it ended with the fall of...