The Penguin English Library edition A dense yellow miasma swirls in the streets of London as Sherlock Holmes & Dr Watson accompany a beautiful young woman to a sinister assignation For Mary Marston has received several large pearls
- one a year for the last six years
- & now a mystery letter telling her she is a wronged woman If she would seek justice she is to meet her unknown benefactor bringing with her two companions But unbeknownst to them all others stalk London's fog-enshrouded streets a one-legged ruffian with revenge on his mind
- & his companion who places no value on human life