This post sort of ties in with Line's invaluable gossip analysis, but I would like to look at things in an even more general way. I've become more and more interested recently in how information is handed on "behind the reader's back", i.e without its being said explicitly in the text.

I've been wondering why Georgiana should want to meet Lizzy. We know that "whatever desire Miss Darcy might have of being acquainted with her must be the work of her brother" (ch.43) and that "Georgiana was eager" (ch.44) to be pleased with Lizzy. Moreover, we learn that Darcy "had spoken in such terms of Elizabeth as to leave Georgiana without the power of finding her otherwise than lovely and amiable" (ch.45).
How did he do it? Did he tell Georgiana that he met the love of his life, proposed to her and was rejected? Or does he say something along the lines of: There is this gorgeous woman I met, but you know, we'll probably never meet again...?
They must have discussed her in some detail and I know that Darcy and Georgiana are supposed to be very close, but on the other hand, isn't he just a little bit too much in the place of a parent to be completely disclosing his heart's secrets to his younger sister? Somehow I can't imagine it.