Question: What novel sequence by the husband of Eveline Hańska is generally viewed as his "magnum opus"?
Sentence (from "Ewelina Hańska"): Eveline Hańska (Ewelina, née Rzewuska, 6 January c. 1805 – 11 April 1882) was a Polish noblewoman best known for her marriage to French novelist Honoré de Balzac.
Relevant evidence: Yes