<span>The tone of the final words of the speaker is ominous. He is implying that the duchess is dead without outright saying she is thus. From a certain point of view, it could even be argued that he implies that he may have had a hand in the duchess' smiles stopping.</span>
Dr. Lanyon is an intelligent, respectable lawyer who is suspicious the "Mr. Hyde" is threatening or bullying Dr. Jekyll into giving him property and leaving money for him in his will. Because Dr. Lanyon is an intelligent man, he always looks for a logical, practical answer, which is why he does not wonder is Hyde and Jekyll are the same person.
Answer:
it makes the sentence much more vivid and powerful.
Explanation:
