| Stamford: I could imagine his giving a friend a little pinch of the latest vegetable alkaloid, not out of malevolence, you understand, but simply out of a spirit of inquiry in order to have an accurate idea of the effects. |
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Stamford: You must study him, then ... you'll find him a knotty problem, though. I'll wager he learns more about you than you about him. | |
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Sherlock Holmes: I have to be careful ... for I dabble with poisons a good deal. | |
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| John Watson: No man burdens his mind with small matters unless he has some very good reason for doing so. |
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| Sherlock Holmes: You know a conjuror gets no credit when once he has explained his trick and if I show you too much of my method of working, you will come to the conclusion that I am a very ordinary individual after all. |
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