§ 12. Again: As it seldom struck the old painters that boughs must cross each other, so it never seems to have occurred to them that they must be sometimes foreshortened. I chose this bit from "Aske Hall," that you might see at once, both how Turner foreshortens the main stem, and how, in doing so, he shows the turning aside, and outwards, of the one next to it, to the left, to get more air.[6] Indeed, this foreshortening lies at the core of the business; for unless it be well understood, no branch-form can ever be rightly drawn. I placed the oak spray in Plate 51 so as to be seen as nearly straight on its flank as possible. It is the most uninteresting position in which a bough can be drawn; but it shows the first simple action of the law of resilience. I will now turn the bough with its extremity towards us, and foreshorten it (Plate 59), which being done, you perceive another tendency in the whole branch, not seen at all in the first Plate, to throw its sprays to its own right (or to your left), which it does to avoid the branch next it, while the _forward_ action is in a sweeping curve round to your right, or to the branch's left: a curve which it takes to recover position after its first concession. The lines of the nearer and smaller shoots are very nearly--thus foreshortened--those of a boat's bow. Here is a piece of Dutch foreshortening for you to compare with it, Fig. 64.[7] [Illustration: FIG. 64.] § 13. In this final perfection of bough-drawing, Turner stands _wholly alone_. Even Titian does not foreshorten his boughs rightly. Of course he could, if he had cared to do so; for if you can foreshorten a limb or a hand, much more a tree branch. But either he had never looked at a tree carefully enough to feel that it was necessary, or, which is more likely, he disliked to introduce in a background elements of vigorous projection. Be the reason what it may, if you take Lefèvre's plates of the Peter Martyr and St. Jerome--the only ones I know which give any idea of Titian's tree-drawing, you will observe at once that the boughs lie in flakes, artificially set to the right and left, and are not intricate or varied, even where the foliage indicates some foreshortening;--completing thus the evidence for my statement long ago given, that no man but Turner had ever drawn the stem of a tree. [Illustration: FIG. 65.] [Illustration: FIG. 66.]