She was thinking over the new idea which had come to her when she heard of the library.

She did not care very much about the library itself, because she had read very few books; but to hear of it brought back to her mind the hundred rooms with closed doors.

She wondered if they were all really locked and what she would find if she could get into any of them.

Were there a hundred really?
Why shouldn't she go and see how many doors she could count?
It would be something to do on this morning when she could not go out.

She had never been taught to ask permission to do things, and she knew nothing at all about authority, so she would not have thought it necessary to ask Mrs.Medlock if she might walk about the house, even if she had seen her.
She opened the door of the room and went into the corridor, and then she began her wanderings.