sical and vagrant thought or desire.
Then a sudden jar shook him. For a moment he had the sensation of struggling up from warm, drowsy depths. And then, suddenly, he was looking into Big Tim Austin's puzzled and incredulous face, and that eery mental surcease was gone.
"Brad—did you feel it, too?"
Nellon nodded wordlessly. He was a little frightened of the weird force that had held them both in thrall. A glance at the column looming gigantically before him showed that he and Big Tim had walked a good distance without any conscious knowledge of having done so. It was the chance collision which had aroused them both from their sleep-walking state.
NELLON could feel the force yet, brushing at the fringes of his mind with warm, soothing fingers. But he soon found that, with active resistance, there was no fear of it overcoming him again. One thing persisted, however, and that was the curiously refreshed and stimulated condition of his body. Nor was he anxious that this should go away.
They were within yards of the great column, now, and at an ever shortening range their eyes began to make out certain details which they had missed during their progress under that inexplicable half-trance.
It was not actually a column, they realized, for it was hollow and they could dimly make out the shapes of objects within. It was a vast, room-like cylinder or enclosure, with walls of transparent green. In the center, and midway between floor and ceiling, there hung what seemed to be a ball of vivid green fire.
Upon reaching the cylinder, they pressed closely to its hard surface and peered intently within. But at first the great, flaming ball obscured such early details as they could discern. It was like looking upward through water at the blinding disc of the sun. Then, as their eyes grew accustomed to the emerald brilliance, they found themselves gazing at an unbelievable scene.
High above floated the fiery, green ball. Directly below it glittered the complex mass of a great machine. This was spread upon a huge base and narrowed as it rose. Circling the apex were a multitude of rod-like projections, the ends of which terminated in large crystal cones. The bases of these were pointed upward, and from each a pale, almost invisible, beam shot up and into the green ball, as though as once nourishing and supporting it.
But it was not this which held the incredulous fixity of their gaze. For arranged in concentric circles about the machine were hundreds of tables or low platforms and upon each a still figure lay. The nearest table was some distance from the wall through which Nellon and Austin peered, and this, added to the weird, green light of the globe, made a clear delineation of physical characteristics impossible. Yet they were able to make out enough to become convinced, that, as their earlier examination of the clothing in the rooms had suggested, the figures were hauntingly human.
FOR a long moment they stood there.
Then Big Tim turned, and Nellon, looking around in response to the action, was amazed at the bright and feverish gleam in the other's eyes. Words tumbled from Big Tim's lips in a hoarse rush.
"Brad, this is going to make interplanetary history. It's the biggest thing since the discovery of the first dead city on Mars. We've got to go back to the ship and bring the others. They've
