"And I read how Jane Eyre used to go up on to the roof when Mrs Fairfax was making jellies"

Jane Eyre is the heroine of Charlotte Brontë's novel Jane Eyre, and Mrs. Fairfax is the housekeeper at Thornfield Hall, where Jane goes as governess to Mr. Rochester's ward, Adèle.

A little later in the text , there is a reference to Grace Poole, the servant who looks after Mr. Rochester's insane wife, Bertha Mason.