Final answer:
The question seems to pertain to a plot point not explicitly mentioned in the provided texts. The passages, which feature a character named Dupin, suggest a literary work involving themes of intrigue and mystery rather than the specific accusation of Darnay against his uncle.
Step-by-step explanation:
The passage provided does not contain a direct reference to Darnay accusing his uncle. However, the excerpts involve characters discussing various schemes and the recalling of a character named Dupin. Given the nature of the conversation, it is clear that the text involves literary analysis, hinting at themes of intrigue, deception, and strategic thinking. The characters engage in conversations about investigations, secrets, and the intricate politics of the situations they are discussing. Dupin appears to be a man of considerable deduction and analytical skills, navigating complex situations with keen insight.