To understand what sort of trees they were from which he got his inspiration, you must look, not at an average English wood, perpetually thinned out as the trees arrive at middle age. Still less must you look at the pines, oaks, beeches, of an English park, where each tree has had space to develop itself freely into a more or less rounded form. You must not even look at the tropic forests. For there, from the immense diversity of forms, twenty varieties of tree will grow beneath each other, forming a close-packed heap of boughs and leaves, from the ground to a hundred feet and more aloft.
You should look at the North American forests of social trees—especially of pines and firs, where trees of one species, crowded together, and competing with equal advantages for the air and light, form themselves into one wilderness of straight smooth shafts, surmounted by a flat sheet of foliage, held up by boughs like the ribs of a groined roof, while underneath the ground is bare as a cathedral floor.
You all know, surely, the Hemlock spruce of America; which, while growing by itself in open ground, is the most wilful and fantastic, as well as the most graceful, of all the firs; imitating the shape, not of its kindred, but of an enormous tuft of fern.
Yet if you look at the same tree, when it has struggled long for life from its youth amid other trees of its own kind and its own age, you find that the lower boughs have died off from want of light, leaving not a scar behind. The upper boughs have reached at once the light and their natural term of years. They are content to live, and little more. The central trunk no longer sends up each year a fresh perpendicular shoot to aspire above the rest, but, as weary of struggling ambition as they are, is content to become more and more their equal as the years pass by. And this is a law of social forest trees, which you must bear in mind whenever I speak of the influence of tree-forms on Gothic architecture.
Such forms as these are rare enough in Europe now.
I never understood how possible, how common they must have been in medieval Europe, till I saw in the forest of Fontainebleau a few oaks, like the oak of Charlemagne and the Bouquet du Roi, at whose age I dare not guess, but whose size and shape showed them to have once formed part of a continuous wood, the like whereof remains not in these isles—perhaps not east of the Carpathian mountains. In them a clear shaft of at least sixty, it may be eighty feet, carries a flat head of boughs, each in itself a tree. In such a grove, I thought, the heathen Gaul, even the heathen Frank, worshipped beneath “trees of God.” Such trees, I thought, centuries after, inspired the genius of every builder of Gothic aisles and roofs.
Thus, at least, we can explain that rigidity, which Mr. Ruskin tells us, “is a special element of Gothic architecture. Greek and Egyptian buildings,” he says—and I should have added, Roman building also, in proportion to their age, i.e. to the amount of the Roman elements in them—“stand for the most part by their own weight and mass, one stone passively incumbent on another: but in the Gothic vaults and traceries there is a stiffness analogous to that of the bones of a limb, or fibres of a tree; an elastic tension and communication of force from part to part; and also a studious expression of this throughout every part of the building.” In a word, Gothic vaulting and tracery have been studiously made like to boughs of trees. Were those boughs present to the mind of the architect? Or is the coincidence merely fortuitous? You know already how I should answer. The cusped arch, too, was it actually not intended to imitate vegetation? Mr. Ruskin seems to think so. He says that it is merely the special application to the arch of the great ornamental system of foliation, which, “whether simple as in the cusped arch, or complicated as in tracery, arose out of the love of leafage. Not that the form of the arch is intended to imitate a leaf, “but to be invested with the same characters of beauty which the designer had discovered in the leaf.” Now I differ from Mr. Ruskin with extreme hesitation. I agree that the cusped arch is not meant to imitate a leaf. I think with Mr. Ruskin, that it was probably first adopted on account of its superior strength; and that it afterwards took the form of a bough. But I cannot as yet believe that it was not at last intended to imitate a bough; a bough of a very common form, and one in which “active rigidity” is peculiarly shown. I mean a bough which has forked. If the lower fork has died off, for want of light, we obtain something like the simply cusped arch. If it be still living—but short and stunted in comparison with the higher fork—we obtain, it seems to me, something like the foliated cusp; both likenesses being near enough to those of common objects to make it possible that those objects may have suggested them. And thus, more and more boldly, the medieval architect learnt to copy boughs, stems, and at last, the whole effect, as far always as stone would allow, of a combination of rock and tree, of grot and grove.
So he formed his minsters, as I believe, upon the model of those leafy minsters in which he walked to meditate, amid the aisles which God, not man, has built. He sent their columns aloft like the boles of ancient trees. He wreathed their capitals, sometimes their very shafts, with flowers and creeping shoots. He threw their arches out, and interwove the groinings of their vaults, like the bough-roofage overhead. He decked with foliage and fruit the bosses above and the corbels below. He sent up out of those corbels upright shafts along the walls, in the likeness of the trees which sprang out of the rocks above his head. He raised those walls into great cliffs. He pierced them with the arches of the triforium, as with hermits’ cells. He represented in the horizontal sills of his windows, and in his horizontal string-courses, the horizontal strata of the rocks. He opened the windows into high and lofty glades, broken, as in the forest, by the tracery of stems and boughs, through which was seen, not merely the outer, but the upper world. For he craved, as all true artists crave, for light and colour; and had the sky above been one perpetual blue, he might have been content with it, and left his glass transparent. But in that dark, dank, northern clime, rain and snowstorm, black cloud and gray mist, were all that he was like to see outside for nine months in the year. So he took such light and colour as nature gave in her few gayer moods; and set aloft his stained-glass windows, the hues of the noonday and the rainbow, and the sunrise and the sunset, and the purple of the heather, and the gold of the gorse, and the azure of the bugloss, and the crimson of the poppy; and among them, in gorgeous robes, the angels and the saints of heaven, and the memories of heroic virtues and heroic sufferings, that he might lift up his own eyes and heart for ever out of the dark, dank, sad world of the cold north, with all its coarsenesses and its crimes, toward a realm of perpetual holiness, amid a perpetual summer of beauty and of light; as one who—for he was true to nature, even in that—from between the black jaws of a narrow glen, or from beneath the black shade of gnarled trees, catches a glimpse of far lands gay with gardens and cottages, and purple mountain ranges, and the far-off sea, and the hazy horizon melting into the hazy sky; and finds his heart carried out into an infinite at once of freedom and of repose.
And so out of the cliffs and the forests he shaped the inside of his church. And how did he shape the outside? Look for yourselves, and judge. But look, not at Chester, but at Salisbury. Look at those churches which carry not mere towers, but spires, or at least pinnacled towers approaching the pyramidal form. The outside form of every Gothic cathedral must be considered imperfect if it does not culminate in something pyramidal.
The especial want of all Greek and Roman buildings with which we are acquainted is the absence—save in a few and unimportant cases—of the pyramidal form. The Egyptians knew at least the worth of the obelisk; but the Greeks and Romans hardly knew even that: their buildings are flat-topped. Their builders were contented with the earth as it was. There was a great truth involved in that; which I am the last to deny.