Something was growing in the heart of the ribbons of color, and Chris strained his shrouded eyes to discern what it was.
Black lines, standing out in the dazzling welter of light—lines that grew and became more solid as he peered at them—lines that were shaping into a recognizable form, the form of a man's skeleton!
The effect was that of an X-ray. A skeleton hung in the cage, held steady by the cords around its arms, its naked skull with yawning eye-pits grinning out at the four men in the room. Soon other details became visible: black lumps that were organs, the web of fine thin lines that were veins; and then a hazy, ghostly outline of flesh that quickly assumed solidity, burying the bones and veins and organs which had been first apparent.
And all the time the dynamo was filling the hut with its sweeping drone, and the million points of light flung from the intercrossing flame-tongues inside the cage were dancing madly on the walls and floor and ceiling, making the whole scene unreal, fantastic, as from a dream....
"There! That iss enough," said Istafiev.
The lever went back. The streaks of blue-white that threaded the cage died; the grayish vapor in the dome above faded away, leaving more of the creamy, bleaching substance than had been there originally; the dynamo was shut off, and silence fell in the room. A naked man with a very white, peaked face and a blotch of blood encrimsoning his neck hung inside the cage, his head pitched over lifelessly to one side.
Chris stared, almost forgetting the pose of unconsciousness in his bewilderment. A queer mechanism shaped in the form of a cylinder from some oddly sparkling, almost transparent material, was clasped to the nude body's chest: over the nose and mouth was another small attachment of the same substance. A nozzle midway in the large cylinder's front side gave him the clue: from it, obviously, had come the gas which had strangled the crews of the dirigibles, and the covering over nose and mouth was a novel gas mask. The material they were made of could, obviously, be rendered invisible—a virtue not possessed by ordinary inorganic substances. Invisible death from an invisible container, carried by an invisible man!
"Yess, dead," hissed Istafiev, probing the motionless, naked body. "He just got here, told what had happened, and died. He was hurt too badly to think of taking off the gas cylinder or putting on a coat. Well, it makes no difference.... Here, Grigory, take off the mask and cylinder and bury him. And you, Kashtanov, look well at this."
From the table, he picked up a large white piece of cardboard and tapped it meaningly. There were two broad lines on it, running side by side through other smaller lines and shaded patches, and there was also a thick black arrow pointing to one particular place on it.