139. Now, these buttresses present one of the most extraordinary and striking instances of the beauty of adaptation of style to locality and peculiarity of circumstance, that can be met with in the whole range of architectural investigation. Taken in the abstract, they are utterly detestable, formal, clumsy, and apparently unnecessary. Their builder thinks so himself: he hates them as things to be looked at, though he erects them as things to be depended upon. He has no idea that there is any propriety in their presence, though he knows perfectly well that there is a great deal of necessity; and, therefore he builds them. Where? On rocks whose sides are one mass of buttresses, of precisely the same form; on rocks which are cut and cloven by basalt and lava dikes of every size, and which, being themselves secondary, wear away gradually by exposure to the atmosphere, leaving the intersecting dikes standing out in solid and vertical walls, from the faces of their precipices. The eye passes over heaps of scoriae and sloping banks of ashes, over the huge ruins of more ancient masses, till it trembles for the fate of the crags still standing round; but it finds them ribbed with basalt like bones, buttressed with a thousand lava walls, propped upon pedestals and pyramids of iron, which the pant and the pulse of the earthquake itself can scarcely move, for they are its own work; it climbs up to their summits, and there it finds the work of man; but it is no puny domicile, no eggshell imagination, it is in a continuation of the mountain itself, inclined at the same slope, ribbed in the same manner, protected by the same means against the same danger; not, indeed, filling the eye with delight, but, which is of more importance, freeing it from fear, and beautifully corresponding with the prevalent lines around it, which a less massive form would have rendered, in some cases, particularly about Etna, even ghastly. Even in the long and luxuriant views from Capo di Monte, and the heights to the east of Naples, the spectator looks over a series of volcanic eminences, generally, indeed, covered with rich verdure, but starting out here and there in gray and worn walls, fixed at a regular slope, and breaking away into masses more and more rugged towards Vesuvius, till the eye gets thoroughly habituated to their fortress-like outlines. [Illustration: Fig. 10. Petrarch's Villa; Arqua.--1837.]