"It knows we stopped," Borden said. "It won't attack. It'll act as if baffled—until there's a fresh mass of it behind us. Then it will drive together and catch us in between. Jerry, are you set to try the talkie stuff?"
"Pretty well," sighed Jerry.
The car crawled back to the highway. The waiting mass of jellylike monster was larger. It grew larger every instant, as fresh waves of its protaean substance arrived through the throbbing of the pseudopod back to the oasis.
"Turn on the walkie-talkie," commanded Borden.
Jerry, white and shaken, threw the switch. An invisible beam of micro-waves sped down the valley behind the halted car. It reached the blob of jelly which now was as large as when it had started from the parent mass. The jelly quivered violently. Then it was still.
"Turn it off," ordered Borden. "Why didn't that work?"
Jerry turned off the micro-wave beam. The jelly quivered once more. Borden, watching with keen eyes, said:
"On again."
The pile of jelly quivered a third time, but less violently. The first impact of the micro-wave beam had bothered it, but it had been able to adjust almost instantly. It perceived the micro-waves. That much was certain. But it could adjust to them.
Borden said furiously, "The damned thing can learn! It can think. It is smart as the devil! But if I am right, what it wants more than anything else is not to do anything. It has to be awake when we are near. It can't help itself, but it wants to sleep. We and our micro-waves are like mosquitos buzzing around a man's head. I thought they—"