been made to and from Mars. A year later, Venus was also reached. But fifty-one years had produced little knowledge of any value; progress was at a standstill. Certainly the Martians had been found to be a highly developed and scientific race. They were peaceful and friendly. But they were also very wise. They were acquainted with the history of man on Earth as far back as the time of Christ. Their astronomical instruments made it possible to see plainly events there, under the proper conditions. With the coming of wireless, they had been able to intercept any and all signals they chose. They knew about all they needed or wanted to know about Earth. That was what made them so wary. For they had seen the torture of the early Christians, and the cruel subjugation of the known world by the Romans. They had seen in turn, the overrunning of Rome by the barbarian hordes. They had known Attila the Hun. They had witnessed the Spanish Inquisition. They had seen the slaughter of the aborigines in the new world, their gradual extinction by the white colonists. They had known Napoleon, and most monstrous and horrible of all, Hitler. They had finally seen the Great Gas War, which had so decimated the ranks of mankind, that it had been necessary to set up the International Peace Council, which established peace by the only method which mankind seemed to be able to understand—force. It was rather simple. The laws were very strict: briefly, the manufacture, transporting, or even possession of any kind of murder weapon, other than what might be carried by a man for his personal defense, was considered sufficient evidence of intent to kill, and carried a death penalty. The agents and inspectors of the Council were everywhere, entering any machine shop or factory at will, constantly checking all sources of raw material, making almost impossible any secret manufacture of any type of armament. But even this could not convince the canny Martians—for they knew that thousands of years of barbarism were covered only by a thin veneer. At any time, man's innate desire to conquer, pillage, and exterminate another race might break through. The Martians well knew the age-old tactics of infiltration used by colonists of Earth. Consequently, only a few scheduled rocket trips per year were permitted. The personnel of each expedition was restricted to a few scientists, who were carefully investigated. They were allowed to study the language, customs, and art of Mars. But scientific achievements and secrets were taboo. No Earthman was permitted to roam at will on Mars—the knowledge they acquired there was given them by an interviewing committee of high ranking Martians, whose ability to sidestep a direct question was