Besides this deed there is no other record of the Frenchman, as the firm became known as “Duesbury and Heath,” and apparently the usual fate of the poor inventor overtook Planché. William Duesbury was of Longton Hall, in Staffordshire, and was the son of a currier. By trade he was an enameller. Entries in the family Bible, in the possession of the Duesburys, prove that in 1755 he removed to Derby to carry on the newly-acquired business “in ye art of making English china, as also in buying and selling all sorts of wares belonging to ye art of making china.” Records of the kinds of china manufactured and sent to London are interesting. There were blue fluted boats, mosaic boats, sage-leaf boats, fig-leaf sauce-boats, octagon fruit plates, vine-leaf plates, coffee cups, flower vases, blue strawberry pots, standing sheep, cats, honeycomb jars, coffee-pots, butter-tubs, Chelsea jars, teapots, figures of Mars, Minerva, &c., Spanish shepherds, candlesticks, and, of course, many varieties of plates and dishes, and cups and saucers. Once or twice the name of the firm appears as “Duesbury and Co.,” but it is more usually “Duesbury and Heath.” Finally, it became Duesbury only. [Illustration: 1750. Earliest Mark (In gold). Under Royal Patronage. 1773. Marked in blue. 1782-1830. Early—marked in puce. Later—blue, red, green, & black. OLD DERBY MARKS.] Coming to the marks which were used, in our illustration we have arranged them in chronological order, the earliest being at the top. The mark used in the earliest days is not certain, but in all probability the letter D, when in gold, is one of the first used. It is, however, exceedingly rare to find a piece thus marked. This letter D may equally stand for Derby or for Duesbury. From 1770 to 1773, the script initial [Illustration: D] and the anchor known as the Derby-Chelsea or the Duesbury-Chelsea mark was introduced, as William Duesbury had purchased “the Chelsea Porcelain Manufactory, and its appurtenances and lease thereof,” on February 5, 1770, and made this addition to the Chelsea anchor. This mark of the Derby-Chelsea period is usually in gold, and was used both at the factory at Chelsea and at Derby. Examples of this period are of comparative rarity, and are eagerly sought after by collectors. The Derby-Chelsea marks are given in the “Chat” on Chelsea (p. 39). The works at Chelsea were not finally discontinued till 1784, when they were destroyed by Duesbury, the kilns and every part of the factory pulled down, and what was available sent off to Derby. About the year 1773, a [Illustration: D] and a crown were used. This mark is mostly in blue, but sometimes in puce, light red, or green. This crown was added by Royal permission, because the factory had been honoured by Royal patronage.