The weather plays an important part in many of Turner's views on the River Seine, adding drama and meaning to the viewpoints chosen. Often his gouache drawings on blue paper bear only the most generalised idea of an effect, which was then refined and developed during the engraving process. In this view of Vernon, for example, the sky has been almost totally revised by J.T.Willmore, who engraved the plate under Turner's supervision. A comparison between the sky in the drawing and the engraving of the same subject shows that the fluffy lines of cloud are merely suggested in the watercolour, while they are given much more definite form in the print.
Gallery label, September 2004