Gresham and Heron
From Graces Guide
or was this Heron and Gresham, of Manchester
1860 James Gresham, a draughtsman at Sharp, Stewart, saw the potential in Giffard's injector
1866 Having left Sharp Stewart, he formed a partnership with John Spier Heron, a wire mattress manufacturer, who added this product to his existing business[1]
1866 Gresham and Heron made arrangements with Giffard to manufacture the injectors in Britain as Gresham and Heron
1869/70 Thomas Craven joined the company but he was not 21 at that time, so presumably Heron, Gresham and Craven initially involved his father, James Craven[2]..
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