The last line stuck out for me too this time around. I don't remember being so impressed about it on previous reads. But, like you, I thought: what a great way to end a chapter. It is so well worded with the use of only seven words and yet it carries so much weight---full of tension and expectation.

JA does an excellent job of setting up Lizzie's change of heart:

1. The letter lays the fertile ground making it possible for her to be open to a different view of Darcy when she gets to Pemberley.

2. Mrs. Reynold's excellent praises (practically gushing) and the evidence of these praises and his personality on the house and grounds of his home, Pemberley, sow the seeds.

3. Darcy's changed behavior is the water and sunshine that allows Lizzie's change-of-heart to grow and flourish. In my opinion, it takes all three for Lizzie's change-of-heart to work successfully and what a pleasure to watch it unfold. :)