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Updated: October 3, 2026
At all events, we read in Pere Du Halde's Description de la Chine, that sometime in or about the year 2635 B.C. the great Emperor Hoang-ti, having lost his way in a fog whilst pursuing the rebellious Prince Tchiyeou on the plains of Tchou-lou, constructed a chariot which showed the cardinal points, thus enabling him to overtake and put the prince to death.
In any case, the Patent Gazette records the following grant: "2635 Henry Fersey Brion, 22 Philip Road, Peckham Rye, London, S.E., and John Thompson, 5 East Terrace, Evelina Road, Peckham Rye, London, S.E., for an invention for raising sunken vessels by the displacement of water within the vessels by air and gases."