Complex sentence: Max's sister Beatrice and brother-in-law Giles convince him to revive his custom of hosting an annual costume ball at the estate, Mrs. Danvers suggests Mrs. de Winter replicate a dress worn by a family ancestor in a portrait hanging in the gallery.
Split into simpler sentences: Max's sister Beatrice and brother-in-law Giles convince him to revive his custom of hosting an annual costume ball at the estate. Mrs Danvers suggests Mrs de Winter replicate a dress worn by a family ancestor in a portrait hanging in the gallery.