Final answer:
Without sentence 65, it is not possible to determine the narrator's response or its correctness as per Dupin in this literary context.
Step-by-step explanation:
The question seems to be referencing a dialogue in a story, possibly Edgar Allan Poe's 'The Purloined Letter,' where Dupin is providing instructions or insights to another character. In the provided excerpts, Dupin suggests actions and gives his opinions, but without sentence 65 it is impossible to determine the narrator's response or to evaluate its correctness according to Dupin. Certain references like "the letter," "Dupin," and "the prefect" suggest that this is indeed referring to Poe's work. Dupin's analytical skills are highlighted through his dialogues with the Prefect and another character, presumably the narrator. Since details for sentence 65 are not provided, a definitive answer cannot be given regarding the narrator's answer or its correctness.