Jane noticed that Grace Poole lived in the attic of Thornfield Hall and
was rarely seen. This mysterious way of life piqued Jane's curiosity,
because in an estate inhabited by a large number of people, a resident
who had little contact with people would naturally become a mystery
Because Jane begins with: 1. The mysterious background of Grace Poole,
2. Grace Poole's actions and remarks, 3. Mr. Rochester's attitude, 4.
The reactions of the other characters, and so on, have made Grace Poole
a mysterious figure