From Kook Science
Henry Gardner (January 20, 1831 - July 16, 1899) was an American inventor who, according to newspaper reports published following his death, had been working on the problem of perpetual motion at Braintree, Massachusetts when he committed suicide in 1899. Whether the claim of his interest in self-motive power was true or simply an embellishment to the story by the media is unclear.
- "SHOTS PROVED FATAL. Henry Gardner of East Braintree Dies from Self-Inflicted Wounds.", Boston Globe (Boston, MA): 10, 17 July 1899, https://www.newspapers.com/image/427949511
- "DEATH OF AN INVENTOR. Henry Gardner, a Perpetual Motion Man, Passes Away.", Brooklyn Daily Eagle (Brooklyn, NY): 5, 17 July 1899, https://www.newspapers.com/image/50386069