Lamoureux found this a little hard to take from a man he suspected of quietly trying to stab him in the back. But he continued to hide his feelings. "That's as may be, McCracken, but he's not cockeyed. These aren't the mountains he described. Still, we may as well approach them. We may be able to get a good view from the top of the taller one." * * * * * They moved onward again. A quarter of an hour's marching took them to the edge of the falling snow. As they walked further, the air became completely clear, and Lamoureux could see the mountains without straining his eyes. There was no doubt about it. They were _not_ the mountains Kalinoff had described. The Mercurian horizon was not so far away as the more familiar horizon of Earth, and it was a little difficult for Lamoureux to estimate distances. Still, the foothills of the mountains could not be more than twenty miles away. For the past day, little more than the rim of the Sun had been visible above the horizon, and while the peaks were ablaze with scarlet and golden colors, only the higher one was out of the shadow to any considerable extent. The saddlebacked ridge itself was a vague outline of dull black. The snow did not catch up with them until four or five hours later, when they stopped to prepare a meal and rest. Then it began to fall gently after they had been in the same place for three-quarters of an hour. By now, Lamoureux was sure that it was the Mercurians who were to blame. He still wondered how they did it. The one they had come across had remained with them, and Lamoureux found it harder than ever to regard the creature as intelligent. All the thing had done was walk and play chess. Lamoureux had a low opinion of chess players, even when they were fairly human. He had an even lower opinion of trained animals. This Mercurian fell, in his estimation, somewhere between. They were no more than a mile or two from the foothills of the larger mountain by now, and the saddlebacked ridge loomed several hundred feet into the air. Unfortunately, the snow was between it and them, and prevented them from gaining too clear a view. Lamoureux wondered if the snow would keep up even at the top of the mountain, and damned McCracken again for shooting that Mercurian. And then he discovered that McCracken's feats of arms were not yet ended. McCracken was at that very moment aiming at some target that Lamoureux could not see. Lamoureux sprang to his feet. "Don't shoot, you fool!" He was a little too late. The noise of the explosion rang out. McCracken said, "Sorry, sir, I didn't hear you until my finger had already squeezed the trigger. But I wasn't trying to hit anything that was alive. There was something that looked like a rock on that ridge--"