The Thames near Windsor (1827) : This is one of the eighteen sketches Thames river, in of various sizes, painted on mahogany veneer, are all from the Turner Bequest. These sketches were probably done out-of-doors, perhaps from a small boat as the younger Trimmer described, even though he talks of Turner using �a large canvas�. In them Turner approaches nearest to what Constable termed �a natural painter�, but, unlike Constable, Turner always seems to have been interested in making a complete pictorial composition even when he came closest to recording a direct experience of nature. *JMW (Joseph Mallord William) TURNER (1775-1851) was one of the most important English Romantic Painters of the 19th century. He is known for his expressive colourisations, imaginative landscapes and turbulent, often violent marine paintings. Turner's imagination was sparked by shipwrecks, fires, and natural phenomena such as sunlight, storm, rain, and fog. He was fascinated by the violent power, turbulence and tidestorms of the sea. It's said that his last words before death were, 'The Sun is God!'