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Jane Austen meets Sherlock Holmes when a crime wave sweeps through 19th-century London's Jewish community and the adventures of wealthy-widower-turned-sleuth Ezra Melamed are recorded for posterity by Miss Rebecca Lyon, a young lady not quite at the marriageable age. In this third volume of the series, tragedy strikes when the Jewish orphanage's children are stricken with a mysterious and nearly fatal stomach ailment. When the ailment travels to the Mayfair home of Lady Marblehead, a young Jewish physician is accused of poisoning his patients - a suspicion that is further fueled when a priceless pearl bracelet is discovered missing from Lady Marblehead's jewellery box. As more outbreaks occur, an increasingly hysterical community turns to Mr Ezra Melamed to investigate the case. But once again there are too few clues and too little time, especially since the littlest victim, a frail orphan boy, is already almost at death's door.