He had hoped the rockhound would go shooting past, but the animal braked itself barely in time. Kreega went down the cliff face, clawing into every tiny crevice, shuddering as the age-worn rock crumbled under his fingers. The hawk swept close, hacking at him and screaming for its master. He couldn't fight it, not with every finger and toe needed to hang against shattering death, but-- He slid along the face of the precipice into a gray-green clump of vines, and his nerves thrilled forth the appeal of the ancient symbiosis. The hawk swooped again and he lay unmoving, rigid as if dead, until it cried in shrill triumph and settled on his shoulder to pluck out his eyes. Then the vines stirred. They weren't strong, but their thorns sank into the flesh and it couldn't pull loose. Kreega toiled on down into the canyon while the vines pulled the hawk apart. Riordan loomed hugely against the darkening sky. He fired, once, twice, the bullets humming wickedly close, but as shadows swept up from the depths the Martian was covered. The man turned up his speech amplifier and his voice rolled and boomed monstrously through the gathering night, thunder such as dry Mars had not heard for millennia: "Score one for you! But it isn't enough! I'll find you!" The sun slipped below the horizon and night came down like a falling curtain. Through the darkness Kreega heard the man laughing. The old rocks trembled with his laughter. * * * * * Riordan was tired with the long chase and the niggling insufficiency of his oxygen supply. He wanted a smoke and hot food, and neither was to be had. Oh, well, he'd appreciate the luxuries of life all the more when he got home--with the Martian's skin. He grinned as he made camp. The little fellow was a worthwhile quarry, that was for damn sure. He'd held out for two days now, in a little ten-mile circle of ground, and he'd even killed the hawk. But Riordan was close enough to him now so that the hound could follow his spoor, for Mars had no watercourses to break a trail. So it didn't matter. He lay watching the splendid night of stars. It would get cold before long, unmercifully cold, but his sleeping bag was a good-enough insulator to keep him warm with the help of solar energy stored during the day by its Gergen cells. Mars was dark at night, its moons of little help--Phobos a hurtling speck, Deimos merely a bright star. Dark and cold and empty. The rockhound had burrowed into the loose sand nearby, but it would raise the alarm if the Martian should come sneaking near the camp. Not that that was likely--he'd have to find shelter somewhere too, if he didn't want to freeze. _The bushes and the trees and the little furtive animals whispered a word he could not hear, chattered and gossiped on the wind about the Martian who kept himself warm with work. But he didn't understand that language which was no language._