The death of two former Presidents

On July 4, 1826 went down in history not only as the day on which the Declaration of Independence made fifty years but also because two of its most influential and staunch advocates and defenders died mysteriously.

These last two were called John Adams and Thomas Jefferson, respectively the second and third President of the United States of America, who that day, both in their beds, exhaled their last breath.

Thomas Jefferson died first, precisely ten minutes before 01.00 AM, then a few hours later, John Adams, whose last words, among other things, contributed enormously to wrap this already strange coincidence in an arcane veil.

According to Richard B. Bernstein Adams's last words were: "Independence forever" and "Thomas Jefferson survives"

Did they die to mere chance that day?

Did they decide to die that day?

or were they killed? and in this case, by whom and why?

For now we only know that Jefferson died at the age of 83 years, and Adams at the age of 91.