She could only perceive that it must relate to Wimpole Street and Mr.Crawford, and only conjecture that something very imprudent had just occurred in that quarter to draw the notice of the world, and to excite her jealousy, in Miss Crawford's apprehension, if she heard it.
Miss Crawford need not be alarmed for her.

She was only sorry for the parties concerned and for Mansfield, if the report should spread so far; but she hoped it might not.

If the Rushworths were gone themselves to Mansfield, as was to be inferred from what Miss Crawford said, it was not likely that anything unpleasant should have preceded them, or at least should make any impression.
As to Mr.Crawford, she hoped it might give him a knowledge of his own disposition, convince him that he was not capable of being steadily attached to any one woman in the world, and shame him from persisting any longer in addressing herself.
It was very strange! She had begun to think he really loved her, and to fancy his affection for her something more than common; and his sister still said that he cared for nobody else.

Yet there must have been some marked display of attentions to her cousin, there must have been some strong indiscretion, since her correspondent was not of a sort to regard a slight one.
Very uncomfortable she was, and must continue, till she heard from Miss Crawford again.

It was impossible to banish the letter from her thoughts, and she could not relieve herself by speaking of it to any human being.