Ruthven paid no attention to the obvious as stated by his fellow scientist. His fury was a red, pulsing thing inside him, fed by his own helplessness. To be pinned here so near his goal, fastened up as a target for an inanimate but cunningly fashioned weapon, ate into him like a stream of deadly acid. His big gamble would puff out in a blast of fire to light up Topaz's sky, with nothing left--nothing. On the armrest of his sling-seat his nails scratched deep. The four men in the control cabin could only sit and watch, waiting for the rendezvous which would blot them out. Ruthven's flaming anger was a futile blaze. His companion in the passenger seat had closed his eyes, his lips moving soundlessly in an expression of his own scattered thoughts. The pilot and his assistant divided their attention between the screen, with its appalling message, and the controls they could not effectively use, feverishly seeking a way out in these last moments. Below them in the bowl of the ship were those who would not know the end consciously--save in one compartment. In a padded cage a prick-eared head stirred where it rested on forepaws, slitted eyes blinked, aware not only of familiar surroundings, but also of the tension and fear generated by human minds and emotions levels above. A pointed nose raised, and there was a growling deep in a throat covered with thick buff-gray hair. The growl aroused another similar captive. Knowing yellow eyes met yellow eyes. An intelligence, which was certainly not that of the animal body which contained it, fought down instinct raging to send both those bodies hurtling at the fastenings of the twin cages. Curiosity and the ability to adapt had been bred into both from time immemorial. Then something else had been added to sly and cunning brains. A step up had been taken--to weld intelligence to cunning, connect thought to instinct. More than a generation earlier mankind had chosen barren desert--the "white sands" of New Mexico--as a testing ground for atomic experiments. Humankind could be barred, warded out of the radiation limits; the natural desert dwellers, four-footed and winged, could not be so controlled. For thousands of years, since the first southward roving Amerindian tribes had met with their kind, there had been a hunter of the open country, a smaller cousin of the wolf, whose natural abilities had made an undeniable impression on the human mind. He was in countless Indian legends as the Shaper or the Trickster, sometimes friend, sometimes enemy. Godling for some tribes, father of all evil for others. In the wealth of tales the coyote, above all other animals, had a firm place.