Weird whisperings there were from above and all about them. It seemed almost that the uncanny, weaving green things were alive and voicing indignant protest over the intrusion of the three humans. Ankle deep in the rain-soaked moss, their clothing drenched and steaming, they pressed ever deeper into the tangle. All sense of direction was lost. "Guess we'd better rest now," said Blaine, seeing that Ulana was gasping from her exertions, "They'll never trail us here." "How about this crystal thing--the searching ray?" Tommy ventured. "It can not follow us," the girl explained, "Certain juices of the plants provide an insulator against the ray. In fact, it was an extract of these that was used in protecting the underground laboratory we just left. We are safe now and I am very tired." So that was the reason Tiedus had been so certain they would be safe in the jungle! Blaine had wondered about that searching ray, and now Ulana's statement had stilled his doubts. Poor kid--she was all in! Her shoulders drooped and she leaned on his arm for support. His conscience troubled him for having forced the pace in the difficult footing. They need not have come so far in. * * * * * A glint of light through the close packed stems caught his eye; something phosphorescent it was, shining there in the green twilight. A giant mushroom! Towering seven feet from the ground, the great umbrella-like top was aglow with sulphurous light on its under side. And, beneath its ten foot spread, the mossy carpet was dry. An ideal shelter. Here Ulana might find the rest she so sorely needed, and in comparative comfort. She curled up beside the huge stem and, half buried in warm, dry moss, immediately fell asleep. The Earth men sat gazing solemnly at each other; speechless. In the dim distance the roar of a monorail car rose faintly at first, then grew louder and louder, only to fade away once more into the whispering silence. A steady patter of jungle rain drummed on the mushroom top. "God!" Tommy muttered, after a while. "I'd give my right eye for a cigarette." "Me too." Blaine was hugging his knees, nodding drowsily. "A nice rare steak with mushroom sauce wouldn't go so bad, either," he drawled. "Aw, have a heart. I'm so sick of these vitamin pills of theirs I never want to see one again." "Yeah, but they're better than nothing. We haven't any of those even." "Say!" Tommy jumped to his feet in sudden remembrance. "I saw a bush, back there about fifty feet, with bunches of big red berries on it. Like grapes, they looked. May be good to eat." "Sure, they _may_ be. And then again they may be poison. We can't take any chances like that. Leave 'em alone." * * * * *