1/ At the Lucases, when sir William Lucas tries to make them dance.
2/ The first evening at Netherfield (chapter 8), about his sister's growth, "she is now about Miss Elizabeth Bennet's height".
3/ The same evening, after Miss Bingley's teasing of Eliza about books, "and to all this she must yet add something more substantial,in the improvement of her mind by extensive reading."
4/ "Mr Darcy took her advice, and finished his letter." (chapter 10)
5/ "When that business was over, he applied to Miss Bingley and Elizabeth for the indulgence of some music."
6/ "Do not you feel a great inclination, Miss Bennet, to seize such an opportunity of dancing a reel?"
7/ "This walk is not wide enough for oure party. We had better go into the avenue."
8/ Chapter 11, while he was addressed by Miss Bingley : "He addressed himself directly to Miss Bennet, with a polite congratulation;"
9/ "She had obtained private intelligence that Mr Darcy did not wish for cards;" (this, Elizabeth could hardly guess but why not)
10/ Of course, the exchange at the end of chapter 11.