The opening narrowed instead of widening. The ice above, for some reason, appeared to gain on that below. In growing alarm, Mr. Martell saw that they were becoming shut in, and pointed out the fact to the oarsman. "Shall we turn around?" he asked, excitedly. The man stood up again, and instantly decided. "No, we have not time; the tide is running very swiftly. The ice would close on us before we could get around. Our best chance is to push through. I can see water beyond." They bent to their oars again with the energy which danger inspires. But there was not time. The opening closed too rapidly. Suddenly the bow struck the upper cake, and, being well out of the water, ran up on the ice, causing the boat to take in water at the stern. For a second it seemed that they would be overturned and drowned at once. But just at this moment the upper cake struck the lower ice, and the boat, being well up on the first cake, was not crushed between the two masses, as would have been the case had the ice closed against its sides while they were deep in the water. For a moment they were saved, while the upper and lower floes crunched and ground together under the keel, lifting the light craft still further above the tide and throwing it over on one side. Without a second's pause, the now consolidated field of ice swept downward, carrying with it the wedged and stranded skiff. The lantern gleamed on the pale faces of those who realized that they had just passed through a moment of supreme peril, and perhaps had before them as great if not equally imminent dangers. The oarsman hastily examined the boat, and found that it had been injured, though to what extent he could not tell. Water was oozing in slowly from some point near the keel, but they were too high out of the water to know whether more dangerous leaks had been made. They tried to break their way out, but found that the two cakes had become so joined together as to form a solid mass, upon which they could make no impression.