On our arrival at Naples, in course of time we grow more intimately acquainted with the peculiar attractions of “the Mountain,” as the Neapolitans always designate their treacherous but fascinating neighbour, of whose near existence they have every reason to be proud, for certainly Vesuvius, though barely as lofty as Ben Nevis, _is_ to us westerns the most famous mountain upon earth. Regarding Vesuvius both from the land and the sea, we note that it rises in solitary majesty from an extended base some thirty miles in circumference, and that it sweeps upwards in graceful curving lines until at a distance of about 3000 feet from sea level its summit is cleft into two peaks; that to the north being a rocky ridge which catches our eye as we gaze eastward from the heights of Sant’ Elmo or the Corso at Naples, the other point being the actual cone of the volcano itself. The upper part of the Mountain has in fact two aspects; in other words, Vesuvius is double, being composed of the ridge of Monte Somma to the north, 3760 feet in height, which is pre-historic; and the ever-shifting modern dome of Vesuvius to the south, which is _about_ 4000 feet high. We say “about” purposely, for Vesuvius proper sometimes over-tops, sometimes equals, and sometimes even crouches under its immovable sister-peak, according to the effect produced by volcanic action. Monte Somma, which is one of the everlasting hills, is the parent, and Vesuvius is the child, born but yesterday from a geological point of view, for it is not so old as the Christian era;—“it is a variable heap thrown up from time to time, and again, not seldom, by a greater effort of the same force, tossed away into the air, and scattered in clouds of dust over far-away countries. Thus it has happened often, in the course of these variations of energy, that Vesuvius has risen to a conical height exceeding that of Somma by 500 or 600 feet, and again, the top has been truncated to a level as low as Somma, or even as much below that mountain as we now behold it above.”(3)