ad my thoughts, I shan't be safe,
even here."

Graham frowned. "True," he admitted. "But somehow, when I had the thing
on, I got some funny ideas. I wonder if anyone could really oppress
someone he fully understood. I wonder if two people who could fully
comprehend each other's point of view could have a really serious
disagreement." He picked up the headband, looking at it searchingly.

* * * * *

"And there's another thing," he added. "Unless both parties are wearing
the things, vision seems to be essential to any reaction, at least in
this model. I tried to get thoughts from the kids and from the Moreno's,
upstairs. But there wasn't a thing. And yet, I could get you clearly.
Apparently this thing won't work out as a spy device."

"But, are you sure?"

Graham shrugged wryly. "Well ... no," he admitted. "I'll have to finish
wiring the other set and try 'em both out before I'll be sure of
anything. And it'll take a lot of tests before I'm sure of very much.
Now, I've just got some ideas." He frowned thoughtfully.

"Anyway, I can't stop now. They know about the thing, and I've got to
finish it--or furnish definite proof it's impractical." He turned back
to the desk. "Should be through with the other band in a few minutes.
Just have to put in a couple of filters."

He picked up the completed device and turned around again. "Here,
Elaine, put this on, will you? See what you get. Try to catch a thought
from outside the room."

* * * * *

Dutifully, Elaine Graham accepted the headband. She eyed it doubtfully
for a moment, then adjusted it over her hair, setting the contacts on
her skin as she had seen her husband do. For a few seconds, she stared
at her husband, wide-eyed. Then, she looked away, her eyes focused on
infinity.

Graham busied himself with the soldering iron and another headband.

At last, Elaine took the headband off. "It's weird, Paul," she said.
"When I was looking at you, I knew everything you were thinking. But
when I looked away, there was nothing. It was almost as though I didn't
have it on. Only, I seemed to be able to think so much more clearly."

Graham looked up from his work, squinting thoughtfully. "Yeah," he
muttered. "Yeah, I noticed that, too, come to think of it. Feedback
effect of some sort, I suppose. Have to experiment with that, too, I
expect." He turned back to his work.

* * * * *