By thus working in the open both Constable and Turner, together with their French followers, were able to realise upon canvas a closer verisimilitude to the varying moods of nature than had been attempted before. By avoiding artificially darkened studios they were able to study the problems of light with an actuality impossible under a glass roof. They were in fact children of the sun, and through its worship they evolved an entirely new school of picture-making. The Modern Impressionist, too, is a worshipper of light, and is never happier than when attempting to fix upon his canvas some beautiful effect of sunshine, some exquisite gradation of atmosphere. Who better than Turner can teach the use and practice of value and tone? In triumph he fixed those fleeting mists upon his immortal canvases, immortal unhappily only so long as bitumen, mummy, and other pigment abominations will allow. The technical methods of the French Impressionists and of the early English group vary but little. The modern method of placing side by side upon the canvas spots, streaks, or dabs of more or less pure colour, following certain defined scientific principles, was made habitual use of by Turner. Both Constable and Turner worked pure white in impasto throughout their canvases, high light and shadow equally, long before the advent of the Frenchmen. An example of this was to be seen in a large painting by Constable hung in the Royal Academy Winter Exhibition of 1903. _The Opening of Waterloo Bridge_, exhibited in 1832, was declared by the artist’s enemies to have been painted with his palette-knife. Almost the whole of the canvas, especially the foreground, is dragged over by a full charged brush of pure white, which, catching the uneven surface of the underlying dry impasto work, produces a simple but successful illusion of brilliant vibrating light. This work was not well received by the contemporary press and public. It was regarded as a bad joke, became celebrated as a snowstorm, compared with Berlin wool-work (a favourite simile which Mr. Henley has recently applied to Burne-Jones), and was derided as the product of a disordered brain. Seventy years have barely sufficed for its full appreciation. By a curious coincidence Bonington’s _Boulogne Fishmarket_ was hung almost exactly opposite in the same Winter Exhibition. This canvas must have had an enormous influence with Manet, its blond harmony and rich flat values within a distinct general tone being a distinguishing feature of the great Frenchman’s style.