(often acting as publishers also), either hand-coloured or plain, was James Gillray. The emphasis on portrait-painting in British art was not entirely due to the vanity of the sitters. There was a large collector's market for portrait prints, mostly reproductions of paintings, which were often mounted in albums. From the mid-century there was a great growth in the expensive but more effective reproductions in mezzotint, of portraits and other paintings, with special demand from collectors for early proof states "before letter" (that is, before the inscriptions were added), which the printmakers obligingly printed off in growing numbers. This period marked one of the high points in British decorative arts. Around the mid-century many porcelain factories opened, including Bow in London, and in the provinces Lowestoft, Worcester, Royal Crown Derby, Liverpool, and Wedgwood, with Spode following in 1767. Most were started as small concerns, with some lasting only a few decades while others still survive today. By the end of the period British porcelain services were being commissioned by foreign royalty and the British manufacturers were especially adept at pursuing the rapidly expanding international middle-class market, developing bone china and transfer-printed wares as well as hand-painted true porcelain. The three leading furniture makers, Thomas Chippendale (1718–1779), Thomas Sheraton (1751–1806) and George Hepplewhite (1727?–1786) had varied styles and have achieved the lasting fame they have mainly as the authors of pattern books used by other makers in Britain and abroad. In fact it is far from clear if the last two named ever ran actual workshops, though Chippendale certainly was successful in this and in what we now call interior design; unlike France Britain had abandoned its guild system, and Chippendale was able to employ specialists in all the crafts needed to complete a redecoration. During the period Rococo and Chinoiserie gave way to Neo-Classicism, with the Scottish architect and interior designer Robert Adam (1728–1792) leading the new style. 19th century and the Romantics The late 18th century and the early 19th century characterized by the Romantic movement in British art includes Joseph Wright of Derby, James Ward, Samuel Palmer, Richard Parkes Bonington, John Martin and was perhaps the most radical period in British art, also producing William Blake (1757–1827), John Constable (1776–1837) and J.M.W. Turner (1775–1851), the later two being arguably the most internationally influential of all British artists. Turner's style, based on the Italianate tradition although he never saw Italy