1809 Wedgwood and Byerley showrooms for Wedgewood china, York Street, London, UK. Plate via Rudolph Ackermann’s Repository of Arts. The premises of master potter Josiah Wedgwood in York Street, St James’ Square, London, U.K. Wedgwood china was known for its high quality, beautiful glazes and Wedgwood trademark printed on the back of each item. The London show-room was managed by Thomas Byerley, who also held a quarter share of the business. From 1790 to 1810 the firm was known as Wedgwood and Byerley.