That is with no doubt one of my master pieces in water colour reproductions of the Great Painter Joseph Mallord William Turner (1775-1851), the king of light, precursor of Impressionnists. This painting has an incredible story; I did not know very well this fantastic Artist, only some of the large oil paintings made for the British Royal Court; In 1983 I visited the large exposition dedicated to him in Paris Great Palace; I have been immediately wondered by this complex sky mostly because I did an imaginary painting with the same sky but flipped horizontaly and of course with another landscape under; What a pity I have sold mine some days before this discovery! I bought the museum book of the rich 1983 Paris exposition and tried to reproduce this master piece; When finished, I had a hard result, dryer than the Master 's one; Some months after, I learnt in an Art book that Turner painted it not on a white sheet of paper but on an orange cartoon; I prepared immediately a glass of orange water and applied quickly on all the surface: The Turner appeared, identical!!! It has been shown to the Louvre Conservator and said to be a precious copy!