I looked down upon the plain. An immense column of pulverized pumice, sand and dust was rising with a whirling circular motion like a waterspout; the wind was lashing it on to that side of Snæfell where we were holding on; this dense veil, hung across the sun, threw a deep shadow over the mountain. If that huge revolving pillar sloped down, it would involve us in its whirling eddies. This phenomenon, which is not unfrequent when the wind blows from the glaciers, is called in Icelandic 'mistour.' "_Hastigt! hastigt!_" cried our guide. Without knowing Danish I understood at once that we must follow Hans at the top of our speed. He began to circle round the cone of the crater, but in a diagonal direction so as to facilitate our progress. Presently the dust storm fell upon the mountain, which quivered under the shock; the loose stones, caught with the irresistible blasts of wind, flew about in a perfect hail as in an eruption. Happily we were on the opposite side, and sheltered from all harm. But for the precaution of our guide, our mangled bodies, torn and pounded into fragments, would have been carried afar like the ruins hurled along by some unknown meteor. Yet Hans did not think it prudent to spend the night upon the sides of the cone. We continued our zigzag climb. The fifteen hundred remaining feet took us five hours to clear; the circuitous route, the diagonal and the counter marches, must have measured at least three leagues. I could stand it no longer. I was yielding to the effects of hunger and cold. The rarefied air scarcely gave play to the action of my lungs. At last, at eleven in the sunlight night, the summit of Snæfell was reached, and before going in for shelter into the crater I had time to observe the midnight sun, at his lowest point, gilding with his pale rays the island that slept at my feet. CHAPTER XVI. BOLDLY DOWN THE CRATER Supper was rapidly devoured, and the little company housed themselves as best they could. The bed was hard, the shelter not very substantial, and our position an anxious one, at five thousand feet above the sea level. Yet I slept particularly well; it was one of the best nights I had ever had, and I did not even dream. Next morning we awoke half frozen by the sharp keen air, but with the light of a splendid sun. I rose from my granite bed and went out to enjoy the magnificent spectacle that lay unrolled before me.