Cadbury Timeline By deepak_gupta132 Period: Jan 1, 1800 to Jan 1, 1850 1800-1850 Apr 1, 1824 JOHN CADBURY OPENED BULL STREET SHOP In 1824, John Cadbury opened a grocer’s shop at 93 Bull Street, Birmingham in the 1830's. Among other things, he sold cocoa and drinking chocolate, which he prepared himself using a pestle and mortar.