forgot our slow counting. We were standing on a narrow ridge of the vast abyss: of a sudden the thunder pealed aloud; we ducked our heads involuntarily, as if that would have rescued us from the precipitated masses. The smaller stones soon rattled; and without considering that we had again an interval of cessation before us, and only too much rejoiced to have outstood the danger, we rushed down, and reached the foot of the hill, together with the drizzling ashes, which pretty thickly covered our heads and shoulders.
Tischbein was heartily glad to see me again. After a little scolding and a little refreshment, I was able to give my especial attention to the old and new lava. And here the elder of the guides was able to instruct me accurately in the signs by which the ages of the several strata were indicated. The older were already covered with ashes, and rendered quite smooth: the newer, especially those which had cooled slowly, presented a singular appearance. As, sliding along, they carried away with them the solid objects which lay on the surface, it necessarily happened, that, from time to time, several would come into contact with each other; and these again being swept still farther by the molten stream, and pushed one over the other, would eventually form a solid mass, with wonderful jags and corners, still more strange even than the somewhat similarly formed piles of the icebergs. Among this fused and waste matter I found many great rocks, which, being struck with a hammer, present on the broken face a perfect resemblance to the primeval rock formation. The guides maintained that these were old lava from the lowest depths of the mountain, which are very often thrown up by the volcano.
Upon our return to Naples, we noticed some small houses of only one story, and of a remarkable appearance and singular build, without windows, and receiv-
