Trusting to luck, Dalgard burrowed into the green mass, slashing with his knife at anything which denied him entrance. He was swallowed up in a strange dim world wherein dead shrubs and living were twined together to form a roof, cutting off the light and heat of the sun. From the sour earth, sliming his hands and knees, arose an overpowering stench of decay and disturbed mold. In the dusk he had to wait for his eyes to adjust before he could mark the line of the old path he had taken for his guide. Fortunately, after the first few feet, he discovered that the tunneled path was less obstructed than he had feared. The thick mat overhead had kept the sun from the ground and killed off all the lesser plants so that it was possible to creep along a fairly open strip. He was conscious of the chitter of insects, but no animals lingered here. Under him the ground grew more moist and the mold was close to mud in consistency. He dared to hope that this meant he was either approaching the river or some garden stream feeding into the larger flood. Somewhere the squeal of the hunter kept up a steady cry, but, unless the foliage above him was distorting that sound, Dalgard believed that the box was no longer directly above him. Had he in some way thrown it off his trail? He found his stream, a thread of water, hardly more than a series of scummy pools with the vegetation still meeting almost solidly over it. And it brought him to a wall with a drain through which he was sure he could crawl. Disliking to venture into that cramped darkness, but seeing no other way out, the scout squirmed forward in slime and muck, feeling the rasp of rough stone on his shoulders as he made his worm's progress into the unknown. Once he was forced to halt and, in the dark, loosen and pick out stones embedded in the mud bottom narrowing the passage. On the other side of that danger point, he was free to wriggle on. Could the box trace him now? He had no idea of the principle on which it operated; he could only hope. Then before him he saw the ghostly gray of light and squirmed with renewed vigor--to be faced then by a grille, beyond which was the open world. Once more his knife came into use as he pried and dug at the barrier. He worked for long moments until the grille splashed out into the sluggish current a foot or so below, and then he made ready to lower himself into the same flood. It was only because he was a trained hunter that he avoided death in that moment. Some instinct made him dodge even as he slipped through, and the hurtling black box did not strike true at the base of his brain but raked along his scalp, tearing the flesh and sending him tumbling unconscious into the brown water. 14 THE PRISONER