I was amused when I read this part about Anne after reading *the letter* chapter 23: But the chair would never do. Worse than all! To lose the possibility of speaking two words to Captain Wentworth in the course of her quiet, solitary progress up the town (and she felt almost certain of meeting him) could not be borne. The chair was earnestly protested against, and Mrs. Musgrove, who thought only of one sort of illness, having assured herself, with some anxiety, that there had been no fall in the case; that Anne had not at any time lately slipped down, and got a blow on her head; that she was perfectly convinced of having had no fall; could part with her cheerfully, and depend on finding her better at night.

I thought JA was smiling here. Louisa had quite literally fallen in love (falling off the Cobb) - and as for Anne, she fell in love figuratively. So Mrs Musgrove was not too far from suspecting the truth - Anne did fall.