“She had engaged to go as governess to Mrs. Smallridge’s children—a dear friend of Mrs. Elton’s—a neighbour of Maple Grove; and, by the bye, I wonder how Mrs. Elton bears the disappointment?”
Mrs. Elton thought she had taken on Jane as a 'pet' and this was helping her, but now Jane has to back out of her promise to teach those children. How precarious educational opportunities were for children, even in the upper classes.