The Green Fortress proper stood on a high crag, etched against the smoky grey of Atmion IV's eternal overcast. Standing in the open port of the prison ship, Jerrold could see the black bulk of the turreted stronghold through the curtain of driving rain. The spaceport was a sea of mud that still boiled in places from the heat of the great starship's landing jets. Chained in a long line, the human cargo of the vessel was herded through the rain and mud toward an electrified wire enclosure. Aram smiled wryly at that evidence of "Security." What need was there for it on this world? Where could a prisoner go if he should find himself on the other side of the wire barrier? It was likely, Jerrold thought, that there was a Directive on it from Terminus, and that accounted for the electrified wire. He estimated that there were perhaps nine hundred men and women in the human chain that stretched from the starship to the long reception buildings within the enclosure. The chaff of heterodoxy--cast off by the single-track machinery of galactic bureaucracy. The Greens drove the sodden prisoners through the gates without rancor or interest. It was as though the prisoners had ceased to be human once they crossed the line that excluded them from the society of free men. Inside the long, draughty shelters, the prisoners were stripped naked, men and women alike, run through cleansing water jets, dried, clothed and photographed. Then they were broken into groups and registered by Greens sitting in armored cubicles within the walls. There was a machine-like efficiency to the bureaucratic procedure on this level. Aram Jerrold had the impression that the operation would continue to run by sheer momentum should higher authority suddenly try to halt it.... * * * * * Jerrold presented himself before a Green of about forty, a man with a thin, tired face and colorless eyes, who codified the information given him, looking up at the prisoner with no apparent interest. Quite abruptly, he emerged from his cubicle, signalling another Green to take his place. "You," he said to Aram; "come with me." Jerrold followed the Green out of the reception building and out into the rain. For a wild moment, Aram had the impulse to try an escape, but the thought died stillborn. Escape was plainly impossible. There was simply no place to go--even if he could shake free of his guard and the others stationed about the enclosure. The prison ship was being refuelled a short distance from the reception pen, but the valves were closed and guarded. Presently Jerrold and his guide reached a shaft imbedded in the side of the crag, atop which sat the grim Fortress. Aram turned his eyes upward. The great, bastioned stronghold seemed to crouch on the crest of the cliff. On the highest turret, a green banner emblazoned with a golden Spaceship and Sun hung sodden and limp in the falling rain.