with which, his mind filled with thoughts of flowing leafage and fiery life, he gives those thoughts expression for an instant, and then withdraws within those massy bars and levelled cusps of stone[1].
And his power to do this depended altogether on his retaining the forms of the shadows in his sight. Far from carrying the eye to the ornaments, upon the stone, he abandoned these latter one by one; and while his mouldings received the most shapely order and symmetry, closely correspondent with that of Rouen tracery, compare Plates IV and VIII, he kept the cusps within them perfectly flat, decorated, if at all, with a trefoil (Palazzo Foscari), or fillet (Doge's Palace) just traceable and no more, so that the quatrefoil, cut as sharply through them as if it had been struck out by a stamp, told upon the eye, with all its four black leaves, miles away. No knots of flowerwork, no ornaments of any kind, were suffered to interfere with the purity of its form: the cusp is usually quite sharp; but slightly truncated in the Palazzo Foscari, and charged with a simple ball in that of the Doge; and the glass of the window, where there was any, was, as we have seen, thrown back behind the stone-work, that no flashes of light might interfere with its depth. Corrupted forms, like those of the Casa d'Oro and Palazzo Pisani, and several others, only serve to show the majesty of the common design.
XXII. Such are the principal circumstances traceable in the treatment of the two kinds of masses of light and darkness, in the hands of the earlier architects; gradation in the one, flatness in the other, and breadth in both, being the qualities sought and exhibited by every possible expedient, up to the period when, as we have before stated, the line was substituted for the mass, as the means of division of surface. Enough has been said to illustrate this, as regards tracery; but a word or two is still necessary respecting the mouldings.
Those of the earlier times were, in the plurality of
- ↑ 11. p. 100. 'And levelled cusps of stone': The plate represents one of the lateral windows of the third story of the Palazzo Foscari. It was drawn from the opposite side of the Grand Canal, and the lines of its traceries are therefore given as they appear in somewhat distant effect. It shows only segments of the characteristic quatrefoils of the central windows. I found by measurement their construction exceedingly simple. Four circles are drawn in contact within the large circle. Two tangential lines are then drawn to each opposite pair, enclosing the four circles in a hollow cross. An inner circle, struck through the intersections of the circles by the tangents, truncates the cusps.
