The radio made noises. Lockley turned it in another direction. There was music. Jill's face worked. She struggled not to show how she felt.
The radio said, "Special news bulletin! Special news bulletin! The Pentagon announces that for the first time there has been practically complete success in duplicating the terror beam used by the space invaders at Boulder Lake! Working around the clock, teams of foreign and American scientists have built a projector of what is an entirely new type of electronic radiation which produces every one of the physiological effects of the alien terror beam! It is low-power, so far, and has not produced complete paralysis in experimental animals. Volunteers have submitted themselves to it, however, and report that it produces the sensations experienced by members of the military cordon around Boulder Lake. A crash program for the development of the projector is already under way. At the same time a crash program to develop a counter to it is already showing promising results. The authorities are entirely confident that a complete defense against the no longer mysterious weapon will be found. There is no longer any reason to fear that earth will be unable to defend itself against the invaders now present on earth, or any reinforcements they may receive!"
The newscast stopped and a commercial called the attention of listeners to the virtues of an anti-allergy pill. Jill watched Lockley's face. He did not relax.
The broadcast resumed. With this full and certain hope of a defense against the invasion weapon, said the announcer, it remained important not to destroy the alien ship if it could be captured for study. The use of atom bombs was, therefore, again postponed. But they would be used if necessary. Meanwhile, against such an emergency, the areas of evacuation would be enlarged. People would be removed from additional territory so if bombs were used there would be no humans near to be harmed.
Another commercial. Lockley turned off the radio.
"What do you think?" asked Jill.
"I wish they hadn't made that broadcast," said Lockley. "If there were only monsters involved and they didn't understand English, it would be all right. But with humans helping them, it sets a deadline. If we're going to counter their weapon, they have to use it before we finish the job."
After a moment he said bitterly, "There was a time, right after the last big war, when we had the bomb and nobody else did. There couldn't be a cold war then! There were years when we could destroy others and they couldn't have fought back. Now somebody else is in that position. They can destroy us and we can't do a thing. It'll be that way for a week, or maybe two, or even three. It'll be strange if they don't take advantage of their opportunity."
Jill tried to eat the food Lockley had laid out. She couldn't. She began to cry quietly. Lockley swore at himself for telling her the worst, which it was always his instinct to see. He said urgently, "Hold it! That's the worst that could happen. But it's not the most likely!"
She tried to control her tears.
"We're in a fix, yes!" he said insistently. "It does look like there may be a flock of other space ship landings within days. But the monsters don't want to kill people. They want a world with people working for them, not dead. They've proved it. They'll avoid massacres. They won't let the humans who're their allies destroy the people they want alive and useful."
Jill clenched her fists. "But it would be better to be dead than like that!"
"But wait!" protested Lockley. "We've duplicated the terror beam. Do you think they'll leave it at that? The men who know how to do it will be scattered to a dozen or a hundred places, so they can't possibly all be found, and they'll keep on secretly working until they've made the beams and a protection against them and then something more deadly still! We humans can't be conquered! We'll fight to the end of time!"
"But you yourself," said Jill desperately, "you said there couldn't be a defense against the beam! You said it!"
"I was discouraged," he protested. "I wasn't thinking straight. Look! With no equipment at all, I found out how to detect the stuff before it was strong enough to paralyze us. You know that. The scientists will have equipment and instruments, and now that they've got the beam they'll be able to try things. They'll do better than I did. They can try heterodyning the beam. They can try for interference effects. They may find something to reflect it, or they can try refraction."
He paused anxiously. She sobbed, once. "But other weapons—"
"There may not be any. And there's bound to be some trick of refraction that'll help. It thins out at the edges now. That's how we get warning of it. It's refracted by ions in the air. That's why it isn't a completely tight beam. Ions in the air act like drops of mist; they refract sunshine and make rainbows after rain. And we got the smell-effect first. That proves there's refraction."
He watched her face. She swallowed. What he'd said was largely without meaning. Actually, it wasn't even right. The evidence so far was that the nerves of smell were more sensitive than the optic nerves or the auditory ones, while nerves to bundles of muscle were less sensitive still. But Lockley wasn't concerned with accuracy just now. He wanted to reassure Jill.
Then his eyes widened suddenly and he stared past her. He'd been speaking feverishly out of emotion, while a part of his mind stood aside and listened. And that detached part of his mind had heard him say something worth noting.
He stood stock-still for seconds, staring blankly. Then he said very quietly, "You made me think, then. I don't know why I didn't, before. The terror beam does scatter a little, like a searchlight beam in thin mist. It's scattered by ions, like light by mist-droplets. That's right!"
He stopped, thinking ahead. Jill said challengingly, "Go on!" Again what he'd said had little meaning to her, but she could see that he believed it important.
"Why, a searchlight beam is stopped by a cloud, which is many mist-droplets in one place. It's scattered until it simply doesn't penetrate!" Lockley suddenly seemed indignant at his own failure to see something that had been so obvious all along. "If we could make a cloud of ions, it should stop the terror beam as clouds stop light! We could—"
Again he stopped short, and Jill's expression changed. She looked confident again. She even looked proud as she watched Lockley wrestling with his problem, unconsciously snapping his fingers.
"Vale and I," he said jerkily, "had electronic base-measuring instruments. Some of their elements had to be buried in plastic because otherwise they ionized the air and leaked current like a short. If I had that instrument now—No. I'd have to take the plastic away and it couldn't be done without smashing things."
"What would happen," asked Jill, "if you made what you're thinking about?"
"I might," said Lockley. "I just possibly might make a gadget that would create a cloud of ions around the person who carried it. And it might reflect some of the terror beam and refract the rest so none got through to the man!"
Jill said hopefully, "Then tonight we go into a deserted town and steal the things you need...."
Lockley interrupted in a relieved voice, "No-o-o-o. What I need, I think, is a cheese grater and the pocket radio. And there should be a cheese grater in the house."
He listened at the barn door gap, and then went out. Presently he was back. He had not only a cheese grater but also a nutmeg grater. Both were made of thin sheet metal in which many tiny holes had been punched, so that sharp bits of torn metal stood out to make the grating surface. Lockley knew that sharp points, when charged electrically, make tiny jets of ionized air which will deflect a candle flame. Here there were thousands of such points.