Lady Bertram had been telling her niece in the evening to write to her soon and often, and promising to be a good correspondent herself; and Edmund, at a convenient moment, then added in a whisper, "And _I_ shall write to you, Fanny, when I have anything worth writing about, anything to say that I think you will like to hear, and that you will not hear so soon from any other quarter." 
Lady Bertram had been telling her niece to write to her soon and often, and Edmund added in a whisper, "And I shall write to you, Fanny, when I have anything to say that I think you will like to hear." 