Download or read book The Penguin English Library Sign of Four written by Sir Arthur Conan Doyle and published by National Geographic Books. This book was released on 2014-10-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Penguin English Library edition A dense yellow miasma swirls in the streets of London as Sherlock Holmes and 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 - and 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 - and his companion, who places no value on human life . . .