John Spier Heron, engineer
c.1842 Born in Bowdon, Cheshire
c.1860 Maker of wire mattresses
1861 Engineer, living in Bowdon
Went into partnership with James Gresham to represent Giffard's injector
1866 Founder partner of Gresham and Heron to manufacture the injector.
1871 Civil engineer, living in Didsbury
1875 Left Heron, Gresham and Craven in April due to ill health.
1880 Died in Southport