She looked at herself with a little nod of satisfaction, and then tapped at the door of the room adjoining her own.

It was Miss Sandal's room; and Miss Sandal, though only sixteen months older than Charlotte, exacted all the deference due to her by the right of primogeniture.
"Come in, Charlotte." "How did you know it was I ?" "I know your knock, however you vary it.

Nobody knocks like you.

I suppose no two people would make three taps just the same." She was far too polite to yawn; but she made as much of the movement as she could not control, and then put a mark in her book, and laid it down.

A very different girl, indeed, was she from her younger sister; a stranger would never have suspected her of the same parentage.
She had dark, fine eyes, which, however, did not express what she felt: they rather gave the idea of storing up impressions to be re-acted upon by some interior power.