The medieval architects were crippled to the last by the tradition of artificial Roman forms. They began improving them into naturalness, without any clear notion of what they wanted; and when that notion became clear, it was too late. Take, as an instance, the tracery of their windows. It is true, as Mr. Ruskin says, that they began by piercing holes in a wall of the form of a leaf, which developed, in the rose window, into the form of a star inside, and of a flower outside. Look at such aloft there. Then, by introducing mullions and traceries into the lower part of the window, they added stem and bough forms to those flower forms. But the two did not fit. Look at the west window of our choir, and you will see what I mean. The upright mullions break off into bough curves graceful enough: but these are cut short--as I hold, spoiled--by circular and triangular forms of rose and trefoil resting on them as such forms never rest in nature; and the whole, though beautiful, is only half beautiful. It is fragmentary, unmeaning--barbaric, because unnatural. They failed too, it may be, from the very paucity of the vegetable forms they could find to copy among the flora of this colder clime; and so, stopped short in drawing from nature, ran off into mere purposeless luxuriance. Had they been able to add to their stock of memories a hundred forms which they would have seen in the tropics, they might have gone on for centuries copying nature without exhausting her. And yet, did they exhaust even the few forms of beauty which they saw around them? It must be confessed that they did not. I believe that they could not, because they dared not. The unnaturalness of the creed which they expressed always hampered them. It forbade them to look Nature freely and lovingly in the face. It forbade them--as one glaring example--to know anything truly of the most beautiful of all natural objects--the human form. They were tempted perpetually to take Nature as ornament, not as basis; and they yielded at last to the temptation; till, in the age of Perpendicular architecture, their very ornament became unnatural again; because conventional, untrue, meaningless. But the creed for which they worked was dying by that time, and therefore the art which expressed it must needs die too. And even that death, or rather the approach of it, was symbolised truly in the flatter roof, the four-centred arch, the flat-topped tower of the fifteenth-century church. The creed had ceased to aspire: so did the architecture. It had ceased to grow: so did the temple. And the arch sank lower; and the rafters grew more horizontal; and the likeness to the old tree, content to grow no more, took the place of the likeness to the young tree struggling toward the sky. And now--unless you are tired of listening to me--a few practical words.