There was another fig-tree also, before the temple of Saturn,[1906] which was removed on the occasion of a sacrifice made by the Vestal Virgins, it being found that its roots were gradually undermining the statue of the god Silvanus. Another one, accidentally planted there, flourished in the middle of the Forum,[1907] upon the very spot, too, in which, when from a direful presage it had been foreboded that the growing empire was about to sink to its very foundations, Curtius, at the price of an inestimable treasure—in other words, by the sacrifice of such unbounded virtue and piety—redeemed his country by a glorious death. By a like accident, too, a vine and an olive-tree have sprung up in the same spot,[1908] which have ever since been carefully tended by the populace for the agreeable shade which they afford. The altar that once stood there was afterwards removed by order of the deified Julius Cæsar, upon the occasion of the last spectacle of gladiatorial combats[1909] which he gave in the Forum. CHAP. 21.—CAPRIFICATION. The fig, the only one among all the pomes, hastens to maturity by the aid of a remarkable provision of Nature. (19.) The wild-fig,[1910] known by the name of “caprificus,” never ripens itself, though it is able to impart to the others the principle of which it is thus destitute; for we occasionally find Nature making a transfer of what are primary causes, and being generated from decay. To effect this purpose the wild fig-tree produces a kind of gnat.[1911] These insects, deprived of all sustenance from their parent tree, at the moment that it is hastening to rottenness and decay, wing their flight to others of kindred though cultivated kind. There feeding with avidity upon the fig, they penetrate it in numerous places, and by thus making their way to the inside, open the pores of the fruit.[1912] The moment they effect their entrance, the heat of the sun finds admission too, and through the inlets thus made the fecundating air is introduced. These insects speedily consume the milky juice that constitutes the chief support of the fruit in its infant[1913] state, a result which would otherwise be spontaneously effected by absorption: and hence it is that in the plantations of figs a wild fig is usually allowed to grow, being placed to the windward of the other trees in order that the breezes may bear from it upon them. Improving upon this discovery, branches of the wild fig are sometimes brought from a distance, and bundles tied together are placed upon the cultivated tree. This method, however, is not necessary when the trees are growing on a thin soil, or on a site exposed to the north-east wind; for in these cases the figs will dry spontaneously, and the clefts which are made in the fruit effect the same ripening process which in other instances is brought about by the agency of these insects. Nor is it requisite to adopt this plan on spots which are liable to dust, such, for instance,