We may hear an object spoken of a thousand times, but its peculiar features will never be caught till we see it with our own eyes. The stream of lava was narrow, not broader perhaps then ten feet, but the way in which it flowed down a gentle and tolerably smooth plain was remarkable. As it flowed along, it cooled both on the sides and on the surface, so that it formed a sort of canal, the bed of which was continually raised in consequence of the molten mass congealing even beneath the fiery stream, which, with uniform action, precipitated right and left the scoria which were floating on its surface. In this way a regular dam was at length thrown up, which the glowing stream flowed on as quietly as any mill-stream. We passed along the tolerably high dam, while the scoria rolled regularly off the sides at our feet. Some cracks in the canal afforded opportunity of looking at the living stream from below; and, as it rushed onward, we observed it from above.
A very bright sun made the glowing lava look dull, but a moderate steam rose from it into the pure air. I felt a great desire to go nearer to the point where it broke out from the mountain: there, my guide averred, it at once formed vaults and roofs above itself, on which he had often stood. To see and experience this phenomenon, we again ascended the hill, in order to come from behind to this point. Fortunately at this moment the place was cleared by a pretty strong wind, but not entirely, for all round it the smoke eddied from a thousand crannies; and now we actually stood on the top of the solid roof, which looked like a hardened mass of twisted dough, but projected so far outward, that it was impossible to see the welling lava.
We ventured about twenty steps farther; but the ground on which we stepped became hotter and hotter, while around us rolled an oppressive steam, which obscured and hid the sun. The guide, who was a few
