I do not own Pride and Prejudice. Jane Austen does own it and she did a marvelous job. I have used her characters and some of her text. This story is the result.

What if Mr. Darcy told Elizabeth about Wickham's misdeeds after the dance at Netherfield?

This story starts at the beginning of Ch. 18 of Jane Austen's Pride and Prejudice, when the Bennets arrive at the Netherfield ball.