Elizabeth mentions Wickham to Darcy while they are dancing at the Netherfield Ball. How does Darcy respond?
Darcy responds with some sarcasm and irritation. He notes that Wickham is quite charming, but that he might not be good at being around very long (as is evidenced when he left Darcy's sister and other women he manipulated). Darcy has good reason to be irritated and angry about Wickham due to Wickham's gambling away money Darcy's father had given him and because Wickham deceived his sister and left her heartbroken.
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