'Mr J. J. Connington is a name revered by all specialists on detective fiction' Spectator

When a locum doctor is called out one foggy night to a case of scarlet fever, he mistakes one house for another and discovers a young man lying in a pool of blood, who manages to choke out a dying message.

This intriguing clue-laden third case for Sir Clinton Driffield has its origin in a dark scheme that reveals as much about the means for murder as its motivation.