when an escape capsule was suddenly ejected from it, which later was found to contain Rainbolt, alert and obviously not affected by the paralysis beams. A moment later, the ship itself became a cloud of swiftly dissipating hot gas.

The partial failure of the capture might have been unavoidable in any case. But the manner in which it occurred still reflected very poorly, Menesee thought, on the thoroughness with which the plans had been prepared. The directors who had been in charge of the operation would not be dealt with lightly—

He became aware suddenly that the proceedings of the day had begun and hastily put down the transcript.

Spokesman Dorn, the Machine's executive officer, sitting beside Administrator Bradshaw at a transparent desk on the raised platform to Menesee's left, had enclosed the area about the prisoner with a sound block and was giving a brief verbal resume of the background of the situation. Few of the directors in the Tribunal Hall would have needed such information; but the matter was being carried on the Grand Assembly Circuit, and in hundreds of auditoriums on Earth the first and second echelons of the officials of the Machine had gathered to witness the interrogation of the Mars Convict spy.

The penal settlements on Mars had been established almost a century earlier, for the dual purpose of mining the mineral riches of the Fourth Planet and of utilizing the talents of political dissidents with a scientific background too valuable to be wasted in research and experimental work considered either too dangerous to be conducted on Earth or requiring more space than could easily be made available there. One of these projects had been precisely the development of more efficient spacedrives to do away with the costly and tedious manoeuverings required for travel even among the inner planets.

Work of such importance, of course, was supposed to be carried out only under close guard and under the direct supervision of reliable upper-echelon scientists of the Machine. Even allowing for criminal negligence, the fact that the Mars Convicts were able to develop and test their stardrive under such circumstances without being detected suggested that it could not be a complicated device. They did, at any rate, develop it, armed themselves and the miners of the other penal settlements and overwhelmed their guards in surprise attack. When the next ship arrived from Earth, two giant ore carriers and a number of smaller guard ships had been outfitted with the drive, and the Mars Convicts had disappeared in them. Their speed was such that 

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