I have only been able myself to examine, or in any right sense to see, of this code of subjects, the first, second, fourth, and the St. Louis and Elizabeth. I will ask you only to look at two more of them, namely, St. Francis before the Soldan, midmost on your right, and St. Louis.
The Soldan, with an ordinary opera-glass, you may see clearly enough; and I think it will be first well to notice some technical points in it.
If the little virgin on the stairs of the temple reminded you of one composition of Titian's, this Soldan should, I think, remind you of all that is greatest in Titian; so forcibly, indeed, that for my own part, if I had been told that a careful early fresco by Titian had been recovered in Santa Croce, I could have believed both report and my own eyes, more quickly than I have been able to admit that this is indeed by Giotto. It is so great that—had its principles been understood-there was in reality nothing more to be taught of art in Italy; nothing to be invented afterwards, except Dutch effects of light.
That there is no 'effect of light' here arrived at, I beg you at once to observe as a most important lesson. The subject is St. Francis challenging the Soldan's Magi,—fire-worshippers—to pass with him through the fire, which is blazing red at his feet. It is so hot that the two Magi on the other side of the throne shield their faces. But it is represented simply as a red mass of writhing forms of flame; and casts no firelight whatever. There is no ruby colour on anybody's nose: there are no black shadows under anybody's chin; there are no Rembrandtesque gradations of gloom, or glitterings of sword-hilt and armour.
Is this ignorance, think you, in Giotto, and pure artlessness? He was now a man in middle life, having passed all his days in painting, and professedly, and almost contentiously, painting things as he saw them. Do you suppose he never saw fire cast firelight?—and he the friend of Dante! who of all poets is the most subtle in his sense of every kind of effect of light—though he has been thought by the public to know that of fire only. Again and again, his ghosts wonder that there is no shadow cast by Dante's body; and is the poet's friend, because a painter, likely, therefore, not to have known that mortal substance casts shadow, and terrestrial flame, light? Nay, the passage in the 'Purgatorio' where the shadows from the morning sunshine make the flames redder, reaches the accuracy of Newtonian science; and does Giotto, think you, all the while, see nothing of the sort?
The fact was, he saw light so intensely that he never for an instant thought of painting it. He knew that to paint the sun was as impossible as to stop it; and he was no trickster, trying to find out ways of seeming to do what he did not. I can paint a rose,—yes; and I will. I can't paint a red-hot coal; and I won't try to, nor seem to. This was just as natural and certain a process of thinking with him, as the honesty of it, and true science, were impossible to the false painters of the sixteenth century.
Nevertheless, what his art can honestly do to make you feel as much as he wants you to feel, about this fire, he will do; and that studiously. That the fire be luminous or not, is no matter just now. But that the fire is hot, he would have you to know. Now, will you notice what colours he has used in the whole picture. First, the blue background, necessary to unite it with the other three subjects, is reduced to the smallest possible space. St. Francis must be in grey, for that is his dress; also the attendant of one of the Magi is in grey; but so warm, that, if you saw it by itself, you would call it brown. The shadow behind the throne, which Giotto knows he can paint, and therefore does, is grey also. The rest of the picture [Footnote: The floor has been repainted; but though its grey is now heavy and cold, it cannot kill the splendour of the rest.] in at least six-sevenths of its area—is either crimson, gold, orange, purple, or white, all as warm as Giotto could paint them; and set off by minute spaces only of intense black,—the Soldan's fillet at the shoulders, his eyes, beard, and the points necessary in the golden pattern behind. And the whole picture is one glow.
A single glance round at the other subjects will convince you of the special character in this; but you will recognize also that the four upper subjects, in which St. Francis's life and zeal are shown, are all in comparatively warm colours, while the two lower ones—of the death, and the visions after it—have been kept as definitely sad and cold.
Necessarily, you might think, being full of monks' dresses. Not so. Was there any need for Giotto to have put the priest at the foot of the dead body, with the black banner stooped over it in the shape of a grave? Might he not, had he chosen, in either fresco, have made the celestial visions brighter? Might not St. Francis have appeared in the centre of a celestial glory to the dreaming Pope, or his soul been seen of the poor monk, rising through more radiant clouds? Look, however, how radiant, in the small space allowed out of the blue, they are in reality. You cannot anywhere see a lovelier piece of Giottesque colour, though here, you have to mourn over the smallness of the piece, and its isolation. For the face of St. Francis himself is repainted, and all the blue sky; but the clouds and four sustaining angels are hardly retouched at all, and their iridescent and exquisitely graceful wings are left with really very tender and delicate care by the restorer of the sky. And no one but Giotto or Turner could have painted them.
For in all his use of opalescent and warm colour, Giotto is exactly like Turner, as, in his swift expressional power, he is like Gainsborough. All the other Italian religious painters work out their expression with toil; he only can give it with a touch. All the other great Italian colourists see only the beauty of colour, but Giotto also its brightness. And none of the others, except Tintoret, understood to the full its symbolic power; but with those—Giotto and Tintoret—there is always, not only a colour harmony, but a colour secret. It is not merely to make the picture glow, but to remind you that St. Francis preaches to a fire-worshipping king, that Giotto covers the wall with purple and scarlet;—and above, in the dispute at Assisi, the angry father is dressed in red, varying like passion; and the robe with which his protector embraces St. Francis, blue, symbolizing the peace of Heaven, Of course certain conventional colours were traditionally employed by all painters; but only Giotto and Tintoret invent a symbolism of their own for every picture. Thus in Tintoret's picture of the fall of the manna, the figure of God the Father is entirely robed in white, contrary to all received custom: in that of Moses striking the rock, it is surrounded by a rainbow. Of Giotto's symbolism in colour at Assisi, I have given account elsewhere. [Footnote: 'Fors Clavigera' for September, 1874.]