The development of Gothic architecture, with its new constructive features and the greater variety of geometric spaces, forms, and interstices which, as a consequence, were available for the designer of associated ornament, whether carved work, mosaic, stained glass, or painting, naturally led to a corresponding variety in invention and decorative adaptation; and we may trace the same principle at work in other forms—I mean the principle of corresponding, counterbalancing, and recurring line—Gothic ornament being indeed generally an essential part of the structure, and architectural features being constantly repeated and utilized for their ornamental value, as in the case of canopies and tabernacle work.
We see, for instance, in the Decorated period the acute gable moulding over the arched recess, niche, doorway, or tomb, lightened and vivified by a floriated finial springing into vigorous curves from a vertical stem, forming an emphatic ogee outline which re-echoes the ogee line of the arch below, and is taken up in variations by the crockets carved upon the sides of the gable; and their spiral ascending lines lead the eye up to the finial which completes the composition. We may trace the same principle in the carved fillings of the subsidiary parts, such as the trefoiled panels, the secondary mouldings, and the cusps of the arches, which continue the line-motive or decorative harmony to the last point (see illustration, p. [120]). The elegance and lightness of the pinnacles is increased in the same way, and further emphasized by the long vertical lines of the sunk panels upon their sides.
In church doorways we may see certain voussoirs of the arch allowed to project from the hollow of the concave moulding, and their surfaces carved into bosses of ornament; while, again, the doorway is emphasized by the recurring lines of the mouldings, with their contrasting planes of light and shadow, and the point of their spring is marked by a carved lion, controlled in the design of its contour by the squareness of the block of stone upon which it is carved (see illustration, p. [121]).
The carvings of miserere seats in our cathedral choirs often afford instances of ingenious design and arrangement of elements difficult to combine, yet always showing the instinct of following the control of the dominating form and peculiar lines of the seat itself. There is an instance of one from St. David's Cathedral—apparently a humorous satire—a goose-headed woman offering a cake to a man-headed gull (?), or perhaps they are both geese! I won't pretend to say, but it evidently is intended to suggest cupboard love, and there is a portentously large pitcher of ale in reserve on the bench. But note the clever arrangement of the masses and lines, and how the lines of the seat and the curves of the terminating scroll are re-echoed in the lines of the figures and accessories.