Failure on Titan

Terror flared across the Saturnian moons. One of the Woollies, that perfect slave-race, had killed a man ! But to Big Bill, shambling away from his bloody, suddenly silent master, the ancient pattern of obedience was unchanged.
Big Bill lumbered swiftly forward across the frozen ground, and behind him came the rest of the work gang—a score of bent and mighty manlike shapes, draped like Big Bill from head to foot in long white hair.
They moved in a straggling group, but the rhythmic side sway of the great bodies was more uniform than the tread of marching men. Their red eyes peered ahead through the noonday twilight toward the landing strip two hundred yards away, slashed clean and straight across the ragged low-gravity terrain.
There were human figures—three of them—moving along the edge of the strip that was nearer to the cluster of lighted Company buildings. At the distance they all looked alike, big-headed and thick-waisted in their vacuum suits, but even so, Big Bill identified them with ease. Behind those dull red eyes were perceptions wholly alien to Man's, senses to which the distinctive personalities of the men were things as obvious as are apples or oranges to eyes and fingers.
Brilliant lights flashed on all along the landing strip. Thin nictitating membranes descended over the eyes of the approaching Woollies, and the gang came to a simultaneous halt. They sank slowly to their haunches on the iron-hard, fire-cold surface, and in the act became less like fur-clad men and more like crouching, hairy beasts.
Big Bill hunkered unmoving in his place, but his peculiar senses were probing with an unusual curiosity at the familiar minds of the three men. The one who had just risen from bending over the switchbox that controlled the lights was named Paige, and, when Big Bill's mind touched his, the Woolly felt an odd apathy behind which something tense and secret smoldered like a fire banked under ashes. And the fire was hate.
The second, who stood stiffly near Paige, was called Doc. In his brain too burned hate, a dense and palpable thing to Big Bill, mixed with a fear which turned the hatred inward on the mind that had given it birth.