Random Hunch

This is probably totally wrong, but I keep getting the feeling that Mr. Rochester was in some way responsible for the death of his brother. He continually talks about his "guilty conscience" and is unable to appreciate Thornfield. (maybe his brother died there?) It might have something to do with the Rochester inheritance that Mrs. Fairfax spoke of, and Mr. Rochester's small share as the younger brother. I think in one of his deep conversations with Jane he will reveal this, to her horror.