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reports from human explorers indicate that the amphibians are very shy. Max notices that their brain-cases are large, and speculates that they might be intelligent. The
Tweenies soon realize that the amphibians (or Phibs, as Henry names them) are touch-telepaths, and they learn to communicate with them.
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Then the
Centosaurs break free of the Phibs' control and try to attack them, but Henry and Irene are able to fend them off with their Tonite ray guns until more Tweenies arrive to finish them off. Irene then falls into a swollen river and Henry jumps in after her. The two are rescued by the Phibs.
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The two young
Tweenies and their escorts return to the plateau at night just as a storm breaks. The human settlers are startled out of their sleep by the screaming Centosaurs, and at the sight of them they all run. After the humans leave, the reptiles go on to destroy the deserted human settlement.
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One day, Irene and Henry sneak out of the
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Meanwhile, Arthur's younger brother Henry is exploring Venus and flirting with his girlfriend Irene. The two of them come across a lake hidden within a forest, and see a large amphibian creature rise up from it. The amphibians prove to be friendly, much to Max's puzzlement, since the earlier
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When Henry recovers, his father congratulates him on his plan. With so many other places to settle on Venus, the humans are unlikely to return soon to a place they think is infested with
Centosaurs. When they do finally return, the Tweenies will be ready for them. The story ends with Henry
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Several months later, the
Tweenies are busy setting up their new underground town below a nearby ridge when a group of human settlers crosses over from the far side of the mountains. The Tweenies hide within their town while the humans establish a farming community a few miles away.
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telepathic abilities to take control of three large, dangerous twenty-legged reptilian carnivores called
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begins shortly after the final events in "Half-Breed". The three
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