I. Persuasion
http://books.google.com/books?id=VY65sMlgyi4C&printsec=frontcover&dq=jane+austen+letters&lr=
A few thoughts: Benwick, as perhaps the most learned character of Persuasion, is the only one to have a real connection of intelligence with Anne.  She is as well read as he, if not better as evidenced by her ability to make so many suggestions for prose, as you will see below.  Could it [...]

I think I am on to something pithy.
In my ideas right now it is all about JA’s keen understanding of the gendering of knowledge and the misogynistic contamination of all things bookish, learned, well read.
Her heroines are wise, intelligent, clever, they think for themselves — often in opposition to the way others want them to [...]