In 1815, the Crown Derby factory was leased to the firm's salesman and clerk, Robert Bloor, and the Duesburys played no further part in it. Bloor borrowed heavily to be able to make the payments demanded but proved himself to be a highly able businessman in his ways of recouping losses and putting the business back on a sound financial footing. He also possessed a thorough appreciation of the aesthetic side of the business, and under him the company produced works that were richly coloured and elegantly styled, including brightly coloured Japanese Imari patterns, generally featuring intricate geometric patterns layered with various floral designs. These designs proved extremely and lastingly popular, and Derby continued to thrive.
In 1845, however, Bloor died, and after three years under Thomas Clarke, the Cockpit Works were sold and the factory closed in 1848.