As they were peering in under the overhanging slabs, moved as it were by an instinct to seek some shelter, they arrived at a trench, broad and deeply furrowed, which came right out of the ice. It looked like the bed of some torrent now dried up and everywhere covered with fresh snow. At the spot where it emerged from the ice there yawned a vault of ice beautifully arched above it. The children continued in the trench and, entering the vault, went in farther and farther. It was quite dry and there was smooth ice under their feet. All the cavern, however, was blue, bluer than anything else in the world, more profoundly and more beautifully blue than the sky, as blue as azure glass through which a bright glow is diffused. There were more or less heavy flutings, icicles hung down pointed and tufted, and the passage led inward still farther, they knew not how far; but they did not go on. It would also have been pleasant to stay in this grotto, it was warm and no snow could come in; but it was so fearfully blue that the children took fright and ran out again. They went on a while in the trench and then clambered over its side. They passed along the ice, as far as it was possible to edge through that chaos of fragments and boulders. "We shall now have to pass over this, and then we shall run down away from the ice," said Conrad. "Yes," said Sanna and clung to him. From the ice they took a direction downward over the snow which was to lead them into the valley. But they were not to get far. Another river of ice traversed the soft snow like a gigantic wall bulging up and towering aloft and, as it were, reaching out with its arms to the right and the left. It was covered by snow on top, but at its sides there were gleams of blue and green and drab and black, aye, even of yellow and red. They could now see to larger distances, as the enormous and unceasing snowfall had abated somewhat and was only as heavy as on ordinary snowy days. With the audacity of ignorance they clambered up on the ice in order to cross the interposing tongue of the glacier and to descend farther behind it. They thrust their little bodies into every opening, they put their feet on every projection covered by a white snow-hood, whether ice or rock, they aided their progress with their hands, they crept where they could not walk, and with their light bodies worked themselves up until they had finally gained the top of the wall. They had intended to climb down its other side. There was no other side.