| However, despite spending days retracing the prince's movements, he had not been able to figure out who the tall man was until he saw in a Bohemian newspaper, that an English theatrical troupe had performed for the prince in Prague. The leading man, Sherry Vernet, was therefore obviously a restorationist. |
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| At that moment a knock comes on the door. The three men are disappointed to see it is not Vernet, or the limping doctor, but rather a young boy with a letter for Mr 'Henry Camberley'. The detective accepts the letter, and asks about the man who gave it to the boy: he replies that the man was tall, dark-haired, and smoked a pipe. |
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 | Below is a letter. Oh, he was a tall, handsome man with dark hair, and he was puffing on a pipe. | |
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| Who is the person who requested that you send this letter? | |
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| The letter reveals that the Tall Man knows not only that the detective is not Henry Camberley, but that he knows his real name. He in fact has read a number of his papers, and corresponded with him on his paper The Dynamics of an Asteroid. |
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