Sherlock Holmes sat silently, and watched the fire.Then he said to me, 'John Openshaw is in real danger.Why did his Uncle Elias have to leave America? Becausehe had enemies. When he came back to England hewas afraid. That's why he lived a lonely life and lockedall his doors so carefully. Now where did those letterscome from? Did you see?''The first from Pondicherry in India, the secondfrom Dundee in Scotland and the third from EastLondon,' I answered.'Does that tell you anything?' asked Holmes.