Before he had completed his new book he wanted more skill in colour, and took lessons from Copley Fielding, with no great result, except that the style which he had gained by practice abroad was lost in trying after new models. The sketches of his period as an Oxford undergraduate are comparatively tame and commonplace (1836-1839), though he did some neat bits for Mr. Loudon's wood engraver to spoil in the papers on "The Poetry of Architecture," in the Architectural Magazine, which were his first published writings on art.

In 1840 he broke down in health, after winning the Newdigate prize for poetry at Oxford, and before taking his degree. His parents went with him in the autumn to spend the winter abroad, as a cure for consumption. He did the best for himself, according to new lights on the subject of hygiene, by spending nearly all his time sketching in the open air. Through France to the Loire and Auvergne, round the Riviera to Pisa and Florence and Rome, we can trace him by his drawings, made now on a new method. David Roberts had been showing his Syrian sketches, hard pencil on grey paper, with yellow lights in body colour, and the new style caught young Ruskin's attention before he started for his journey, so that he set out with the resolve of being Roberts now. The same decision of line shows itself on this much larger scale; he always seems to know what he wants, and to get it without trouble; though when one remembers that these half-imperial drawings were done by an ailing lad, supposed to be within danger of death, it is not a little remarkable to see in them such evidences of tenacity and pluck.

At the beginning of 1841 they moved on to Naples, and made excursions to Salerno, Amalfi and the neighbourhood, always with a drawing to bring back; and when he was on his way home, through North Italy, he wrote triumphantly to a friend that he had "got forty-seven large and thirty-four small sketches."

But what he could do with the stimulus of travel he could not do again in the reaction after it was over. He was not quite well yet, and went to Leamington to be under a doctor, in dull lodgings, and without any mountains. Still he drew. By this time he had dropped David Roberts, and taken up Turner, whose art he had already thought of defending against the magazine critics. It was in these circumstances that he made the Amboise, from a sketch of the year before, and certain vignettes for engraving, which were published in "Friendship's Offering," with his poems. In the new Library edition, vol. ii., photographs from the original Amboise, and from the old engraving after it, are given, well worth comparing.

He was not naturally a colourist. In later life he found out for himself the ways and means of producing bits of very sweet opalescent colour, but at any time was capable of relapsing into gaudiness, in hours of fatigue or ill-health; and throughout his earlier life he was much more at home in light and shade, or in work with the point. It was not that he did not see and enjoy colour. To judge by his writings, one would think that he lived for it, almost: and the splendid passage in the first volume of "Modern Painters," so often quoted for its word-painting of colour, was written from his diary-notes on the way back from Naples in 1841. He made a drawing of the scene he described; one would expect at least an attempt at "purple, and crimson, and scarlet, like the curtains of God's tabernacle"; but it is merely washed with faint tints over an elaborate outline of the architecture.

So the passing mood in sickness, which had led him to try after Turnerian colour, left him in health, for the more attainable method of Turner's "Liber Studiorum," and he began, in 1842, to make this his own. A slight pencil blocking out, firm and emphatic quill-pen to represent the etched line, and brushwork in brown, rarely in black, sometimes with a little colour, over paper usually grey—this was after all the manner that suited him best, and very nearly what Mr. Runciman had talked about, ten years before. By degrees, year after year, the pen work became finer, and the colour more predominant; the solid white, used at first for high lights, invaded the tints and gave a mystery to the outline, and in ten years more he had found out his central style, a manner quite his own, producing beautiful results but inimitable by engraving, whether the old style of steel-plate or the new style of photographic process. That style in turn developed into the delicate and often dainty water-colour painting of his later years—passing by the way through a phase in which the pencil took the place of the pen, useful for getting notes of architectural detail and mountain form—and never quite abandoned, though the pencil drawings of the later period became a distinct series, free and emphatic and suggestive, apart from the more laborious elaboration of his last paintings.

In 1845 he went alone, unaccompanied by parents and family, to Italy, and found adventures. He made the acquaintance of the primitive masters at Lucca and Florence, and copied a little; then to the Alps to look for Turner's subjects in the Alpine sketches of 1842, which had so taken his heart. Turner did not like it; it was dangerous to have a writing young man looking behind the scenes of imaginative picture production; but Ruskin found out Turner, and was all the more enthusiastic for the discovery. He drew the Pass of Faido, and saw what Turner had seen, and what he had invented, more wonderful than any transcript from Nature; and afterwards filled half a volume with the endeavour to expound the same. Then, with his versatility of sympathy, he met J. D. Harding, who was not so much his teacher as a valued friend, and together they went to Venice. One sketch-book leaf of this time is particularly interesting—with a pen and tint drawing of a mill at Baveno on one side, and a slapdash sunset on the other, almost Harding. These are photogravured in the "Poems."

The drawings of 1846 were the first serious mountain studies, afterwards used for "Modern Painters," though many things intervened. Sickness at first, and the visit to Crossmount in the Highlands, recorded in some drawings, not his best; and then "Seven Lamps of Architecture," for which he studied in Normandy in 1848, and etched the plates himself in soft ground—strong, sketchy plates which were thought a failure at the time, and re-engraved in a queer imitation of the originals by a professional engraver for the next edition. Then he set to work upon "Stones of Venice."

He had already some material, but most of the drawings were made in two winters, November 1849 to March 1850, and September 1851 to June 1852. Many of the best have been dispersed, some are in America, but enough remain to show what a busy time it was, and how much downright drawing went to the making of that book: how much more drawing, and of how much finer quality than one can guess at from reading the book. The large plates in "Examples of the Architecture of Venice" were not only from his sketches, but from carefully prepared working drawings. For a mezzotint, like the St. Mark's Portico or the Arch of Ca' Contarini Porta di Ferro, he drew the outline separately for etching, and made another drawing with the tint for the completed engraving. To do a subject over again seemed no grievance with him, and there are many examples of his patience in trying the identical view in different aspects or lights, or even redrawing it from Nature without alteration, merely to get a result more to his mind. That the result was worth while in the end we need not stop to declare. "Stones of Venice" was a revelation to architects and the public, and for a long while exerted an enormous influence upon English taste. Suppose, for a moment, such a book had been written, with all the enthusiasm and learning in the world, by a man who could not draw!

The later volumes of "Modern Painters," which followed this, owed their success in great measure to the same cause. The engravings, beautiful as they are, hardly show the originals; though from the book one knows that its author had dwelt upon the aspects of Nature with more than a tourist's glance, and that he had struggled with the problems of art with more than an amateur's attention. His Aiguilles and Matterhorns, his Aspen and his mossy stones, his repeated studies from Turner and the Old Masters, down to the enlargements from illuminated missals, all tell the same tale of passionate interest in the subject and penetrative insight into the situation. They are not, as Professor Norton says, pictures; but incomplete as they are, there is in them an appeal to which most of those who love pictures will respond.