Overall, your essay should provide a unified interpretation of or perspective on the novel, rather than a simple accumulation of unrelated points arising from the chapter. Think of the chapter as the spring-board for developing your particular reading of the novel as a whole; there should be a close relationship between chapter and argument that serves as a unifying thread for the essay. You might wish to focus on language, imagery, narrative structure, or specific events, in order to connect them with wider themes in the novel.