At the end of the story, why do the doctors think that Mrs. Mallard died of “joy that kills”? Do you think their diagnosis is accurate? Cite evidence from the text to support your answer.

London includes a quote about john thornton as he is observing hal attempt to motivate the exhausted dogs "it was idle, he knew, to get between a fool and his folly". if the word "idle" is defined as "of no real worth, importance, or significance", what does this statement mean with regard to hal? who is the fool? what is hal's folly? why would john thornton think it of no real worth or useless to intervene?