But the situation was too critical to permit us to think of the unfortunates whose death we had undoubtedly caused. There seemed less than an even chance of our getting through with our own lives. As we tossed and whirled onward the water rose yet higher, and blocks of ice assailed us on all sides. First the sled on the left was torn loose; then the other followed it, leaving the car to fight its battle alone. But the loss of the sleds was a good thing now that their occupants were gone, for it eased off the weight and the car rose much higher in the water. Moreover, it gave way more readily when pressed by the ice. To be sure, it rolled more than before, but still, being well ballasted, it did not turn turtle, and most of the time we were able to keep on our feet by holding fast to the inside window bars.

Once we took a terrible plunge, over a vertical fall of not less than twenty or thirty feet. But the water below the fall was very deep, a profound hole having been quickly scooped out in the unfathomable ice beneath, so that we did not strike bottom, as I had feared, but came bobbing to the top again like a cork. Below this fall there was a very long series of rapids, extending, it seemed, for miles upon miles, and we shot down them with the speed of an express train, lurching from side to side, and colliding with hundreds of ice floes. It must not be supposed that we went through this experience without suffering any injuries. On the contrary, our hands were all bleeding, our faces cut, Henry had one eye closed by a blow, and our clothing, for we were not wearing our Arctic outfit, was badly used up. Yet none of our injuries was really serious, although we looked as if we had just come out of the toughest kind of a street brawl.

But there is no use in prolonging the story of this awful ride. It seemed to us to last for days upon days, though, in fact, the worst of it was over within twelve hours after we were lifted from our moorings in the valley. The tumbling stream gradually broadened out as it left the region of the high mountains, and then we found ourselves in a district covered with icy hills of no great elevation. But we could still see, by glances, as the stream curved this way and that, the glittering peaks behind. It was an appalling thing to watch many of the nearer hills as they suddenly sank, collapsed, and disappeared, like pinnacles of loaf sugar melting and falling to pieces in a basin of water.

Edmund said that all of the ice-hills and mounds through which we were passing no doubt owed their existence to pressure from behind, in the belt where the sun never rose, and where the ice was piled up in actual mountains. These foothills were, in fact, enormous glaciers thrust out toward the sunward hemisphere.

After a long time the now broad river widened yet more until it became a great lake, or bay. The surface of the planet around appeared nearly level, and, as far as we could see, was mostly covered by the water. Here vast fields of ice floated, and the water was not muddy, as it would have been if it had passed over soil, but of crystal purity and wonderfully blue in places where shafts of sunlight penetrated to great depths—for now the sun was high above the horizon ahead, and shining in an almost clear sky. Presently we began to notice the wind again. It came fitfully, first from one quarter and then another, rapidly increasing until, at times, it rose into a tempest. It lifted the water in huge combing waves, but the car rode them like a lifeboat.

"There is peril for us in this," said Edmund, at last. "We are being carried by the current into a region where the contending winds may play havoc. It is the place where the hot air from the sunward side begins to be chilled and to descend, meeting the colder air from the night side. It must form a veritable belt of storms, which may be as difficult to pass, circumstanced as we are, as the crystal mountains themselves."

"Suppose it should turn out that there is nothing but an ocean on this side of the planet," I suggested.

"That I believe to be impossible," Edmund responded. "This hemisphere must be, as a whole, broken up into highlands and depressions. The geological formation of the other side, as far as I could make it out from the appearance of the rocks in the caverns, indicates that Venus has undergone the same experience of upheavals and fracturings of the crust that the earth has been through. If that is true of one side it must be true of the other also, for during a large part of these geological changes she undoubtedly rotated rapidly on her axis like the earth."

"But we traveled five thousand miles on the other side without encountering anything but a frozen prairie," I objected.

"True enough, and yet I would lay a wager that all of that side of the planet is not equally level. Remember the vast plains of Russia and Siberia."