... 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 mediaeval architect learnt to copy boughs, stems, and, at last, the whole effect, ... — Health and Education • Charles Kingsley
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