How did Nathaniel Hawthorne die?
“Although he had always been an exceptionally active man, Hawthorne’s health began to fail him. Since he refused to submit to any thorough medical examination, the details of his declining health remain mysterious. Hawthorne died on May 19, 1864. He had set off for the New Hampshire hills with Franklin Pierce, an activity he had always enjoyed, hoping to regain his health. But he died the second night in Plymouth, New Hampshire, presumably in his sleep.” He was 60 years old at the time of his death. Perhaps he suffered cardiac arrest apparently there is not much mentioned in records. http://www.notablebiographies.