The Piccadilly Puzzle

The Piccadilly Puzzle revolves around the mysterious murder of a woman on a foggy night in a major London thoroughfare. The woman, initially thought to be a "streetwalker" is soon identified as a certain Miss Sarschine, the mistress of a prominent Lord who has just eloped to the Azores on his private yacht with another Lord's wife. The dead woman was not strangled or stabbed but, rather, poisoned -- the poison apparently being one of those convenient tropical toxins utterly unknown to Western science. The London Police engage Dowker, a private detective to investigate. Will Dowker find the depraved Killer?