Gannett transferred Luke to the dreaded sealed cell in the reduction plant, a room spoken of in hushed whispers by the convicts, and in which it was reported an inmate suffered indescribable tortures for the better part of three weeks. Then he died in horrible misery, for one could not survive longer than that.

Kulan had not been killed. He would recover, but was pretty well smashed up, with a fractured hip and several broken ribs, one of which had punctured a lung. It would be necessary to return him to Mars on the next ethership, due in two days. Strangely, the news brought Luke no great amount of satisfaction.

When they locked him up in the sealed cell for his first period of labor he saw there was only one other occupant. A tall lanky Earthman with narrow aristocratic features and keen gray eyes. He was perhaps forty-five, slightly stooped, and with thin graying hair. Luke had seen him several times at mess and had contemptuously classed him as a highbrow. Fuller, his name was.

This was a small room where several slender chutes brought down tumbling crystals of a silvery salt from somewhere above, emptying it into glass containers that stood in endless rows in wooden racks. You filled these containers with the salt, then sealed them in lead tubes and packed them for shipment. There was a faint pungent odor in the air of the room, a new smell that widened Luke's nostrils and caught at his throat and lungs.

In this place you were watched by a guard who came regularly each half hour and spied on you through a peephole.

Child's play, the work in the sealed cell. Luke went at it half-heartedly and he spoke no word to Fuller after the heavy door had closed them in. After ten minutes of silence he caught himself watching his companion furtively.

What was there about Fuller that marked him as superior to Luke and the rest of the convicts? A good gust of wind would blow the man away; a woman might easily beat him in a rough and tumble. Yet this man had something which unmistakably proclaimed greatness, the same something that gave authority and power to the smart guys of Earth and Mars. Brains—book-learning! Luke snorted.

Fuller was looking at him with calmly appraising gaze. Luke scowled darkly, but the keen eyes that measured him did not waver.

"You're a fool, Fenton," came from the thin lips.

"What!" Luke advanced threateningly.