But thereafter the wreck was unapproachable. The fear generator did not run out of power, might not run out of power for years. Dasinger said, "Doctor, let's hurry this up! Ask him why they weren't affected by their murder machines when they robbed Dosey Asteroids. Do the generators have a beam-operated shut-off, or what?" Graylock listened to the question, said, "We had taken kwil. The effects were still very unpleasant, but they could be tolerated." There was a pause of a few seconds. Dr. Egavine cleared his throat. "It appears, Dasinger," he remarked, "that we have failed to consider a very important clue!" Dasinger nodded. "And an obvious one," he said drily. "Keep it moving along, doctor. How much kwil did they take? How long had they been taking it before the raid?" Dr. Egavine glanced over at him, repeated the questions. Graylock said Hovig had begun conditioning the crew to kwil a week or two before the Antares slipped out of Aruaque for the strike on the station. In each case the dosage had been built up gradually to the quantity the man in question required to remain immune to the generators. Individual variations had been wide and unpredictable. Dasinger passed his tongue over his lips, nodded. "Ask him ..." * * * * * He checked himself at a soft, purring noise, a shadowy fluttering in the air. Graylock's animal flew past him, settled on its master's shoulder, turned to stare at Dasinger and Egavine. Dasinger looked at the yellow owl-eyes, the odd little tube of a mouth, continued to Egavine, "Ask him where the haul was stored in the ship." Graylock confirmed Leed Farous's statement of what he had seen in the Antares's records. All but a few of the star hyacinths had been placed in a vault-like compartment in the storage, and the compartment was sealed. Explosives would be required to open it. Hovig kept out half a dozen of the larger stones, perhaps as an antidote to boredom during the long voyage ahead. Graylock had found one of them just before Hovig's infernal instrument went into action. "And where is that one now?" Dr. Egavine asked. "I still have it." "On your person?" "Yes." Dr. Egavine held out his hand, palm upward. "You no longer want it, Graylock. Give it to me." Graylock looked bewildered; for a moment he appeared about to weep. Then he brought a knotted piece of leather from his pocket, unwrapped it, took out the gem and placed it in Egavine's hand. Egavine picked it up between thumb and forefinger of his other hand, held it out before him. There was silence for some seconds while the star hyacinth burned in the evening air and the three men and the small winged animal stared at it. Then Dr. Egavine exhaled slowly. "Ah, now!" he said, his voice a trifle unsteady. "Men might kill and kill for that one beauty alone, that is true!... Will you keep it for now, Dasinger? Or shall I?" Dasinger looked at him thoughtfully. "You keep it, doctor," he said.