thing that ever
happened. Invaders from space.... Where do you think they came from,
Coburn?"

"The creature that looked like Dillon could climb incredibly fast. I saw
it run and leap. Nothing on Earth could run or leap like that." Coburn
shrugged. "Maybe a planet of another sun, with a monstrous gravity."

"Try to get somebody to believe that, eh?" Hallen got painfully to his
feet. "I'll see what I can do. I ... don't know that I can do anything
but get myself locked up for observation. But I'll call you in an hour."

He went unsteadily out of the door. Coburn instantly called the Breen
Foundation on the telephone. He'd left Janice there less than an hour
before. She came to the phone and gasped when she heard his voice.
Raging, he told her of Helena, then cautioned her to be especially
careful--to be suspicious of everybody.

"Don't take anybody's word!" snapped Coburn. "Doubt everybody! Doubt me!
Until you're absolutely certain. Those creatures are everywhere.... They
may pretend to be anybody!"

After Coburn hung up on Janice, he sat back and tried to think
logically. There had to be some way by which an extra-terrestrial
Invader could be told instantly from a human being. Unmask and prove
even one such creature, and the whole story would be proved. But how
detect them? Their skin was perfectly deceptive. Scratched, of course,
they could be caught. But one couldn't go around scratching people.
There was nothing of the alien creature's own actual form that showed.

Then Coburn remembered the Dillon foam suit. The head had been hollow.
Flaccid. Holes instead of eyes. The creature's own eyes showed through.

But he'd have to make certain. He'd have to look at a foam-suited
creature. He could have examined Helena's eyes, but she was gone now.
However, there was an alternative. There was a Dillon in Salonika, as
there was a Helena. If the Dillon in Salonika was the real Dillon--if
there were a real Dillon--he could look at his eyes. He could tell if he
were the false Dillon or the real one.

* * * * *

At this hour of the afternoon a Britisher would consider tea a
necessity. There was only one place in Salonika where they served tea
that an Englishman would consider drinkable. Coburn got into a cab and
gave the driver the address, and made sure of the revolver in his
pocket. He was frightened. He was either going to meet with a monster
from outer space, or be on the way to making