sentences:  Young made early experiments with the recipe and fired his trial bricks at the Nantgarw Pottery kilns, while he and Pardoe finished the Billingsley porcelain for sale between 1820 and 1821 when he finalised his recipe.In 1822, Young applied to the Marquis of Bute to lease the lands near Craig-y-Dinas, Pontneddfechan, in the upper Neath Valley for a period of twenty-one years.Young had the lease, and the patent (No.