To my knowledge he either died of old age, or alcohol poisoning. To your second question, He died at the age of 81, on October 2, 1803. This is the reason why there's Samuel Adam's Beer! Hope this helps!
Samuel Adams died on October 2, 1803 in Cambridge, MA. He is known as a founding father of the United States.
He died of old age, 91, on july 4, 1826 in Quincy Massachusetts and was buried there
He died of sickness
He didn't.
John T. Adams died in 1939.
John Clayton Adams died in 1906.
John Adams Whipple died in 1891.
John Adams Jackson died in 1879.
John Adams Gilmer died in 1868.
John Adams Harper died in 1816.
John J. Adams died in 1919.
John Jay Adams died in 1926.
John Worthington Adams died in 1837.
John G. Adams died in 2003.
John Adams - educator - died in 1863.