They made several trips to the black pool, and brought in all the liquid they could, for they did not want to have to go outside the petrified city into the wild and desolate country beyond, after the dismal night had settled down. They feared they would become lost again. Their lonely situation seemed to grow upon them. The appalling silence all about terrified them. The weird sight of the petrified men and women in the petrified city got on their nerves. They had done all they could. A store of meat had been blasted out and put away. It would keep outside of the stone shell now, for the weather was getting colder with the advent of the long night. This fact worried them. With the temperature at twenty-eight when the sun was shining, what might it not fall to in the darkness? The terrible cold of the arctic regions might be nothing compared to the frostiness of the dead moon in the shadow. Their fur garments, thick as they were, might be no more protection than so much paper. And they had no means of making a fire, nor anything to burn on one had they been capable of kindling it, for Andy had used the last of his cartridges to blast with, and where everything was petrified there was no wood. Then, too, their life-torches were giving out. The emanations of oxygen were weaker, and they had to hold them almost under their noses to breathe the vital vapor. One day, or rather what corresponded to a day, for they had lost all track of time, Andy Sudds arose from the stone bench on which their meager meal had been served. He started from the restaurant where they had taken up their abode. "Where are you going?" asked Jack. "I'm going to make one last attempt to find the projectile before it gets too dark," answered the hunter. "We can go out, look around for several hours, and get back before darkness sets in. We might as well do it as sit here doing nothing. Then, too, we can bring in some more water. We'll need all we can store away." "I'll go with you," volunteered Jack, and Mark, not wanting to be left alone in the dead city, followed. Carrying their life-torches and wrapping their fur garments closely about them, for it had grown much colder, they sallied forth. They found a thin film of ice on the black pool, showing that it would probably freeze when it got cold enough, though the ordinary temperature of thirty-two degrees had not affected it. They filled their water bottles, and then Andy proposed that they take a new path--one they had not tried before. They hardly knew where they were going, but ever as they tramped on they cast anxious looks upward to see if they might descry the projectile hovering over them. But they did not see it.