 The effects were felt for the following ten years and Hockley only developed as a distinct "quarter" at the centre of the city's jewellery industry after the mid-1830s.The Jewellery Quarter's output surpassed that of the jewellery trade in nearby Derby and the products manufactured in the Quarter also improved in quality.The jewellery trade in Edinburgh also declined and by the end of the 19th century, the middle classes in London depended more on the supply of jewellery from Birmingham than from their own city.