tity turning the other orange
inside out."

His voice dropped, as he muttered, "Imitativeness--the mark of a
mind of low evolutionary order, or of ..." his words faded off,
his expression thoughtful.

More white showed around Harper's eyes. "You--you mean I am being
specially watched by this Being--that He--It--imitates everything
I do...?"

"That's it," clipped Pillbot. "Because you possess this strange
perception of Its realm the Being has been especially attracted
to you, imitates whatever you do, but in a four dimensional
manner. A Being of inexplicable powers and prerogatives, with
weird power over matter, but with a mentality that is either very
primitive, or--"

Harper leaped into the air with a yell, as Professor Gault's
abbreviated body sidled up to him from behind. As he leaped, the
inside out orange flew out of his grasp.

"I just know," he quavered, "that Professor Gault wants me to do
something, is probably barking orders at me from that other
dimension--oh dear, I've dropped the orange on the Professor's--where
his stomach should be!"

The squashy orange had landed on the area of Gault that was the line
of demarkation between his visible and invisible portions--the area
that his stomach would occupy normally. It rested there in plain
sight of the two startled men.

"I--I'd better remove it," said Harper weakly. He moved with a
dreadful compulsion toward the swaying half-figure, one slender
hand extended tremblingly toward the inverted orange.

Abruptly, the orange vanished. Harper halted like he'd run into a
brick wall. Staring blankly ahead, he put his hands to his
stomach, moaning faintly.

"What's the matter?" cried Pillbot.

"The orange--it's in my--stomach!"

"See, what did I tell you," exulted Pillbot. "Another act of
imitativeness. It saw you drop the orange on Gault's--where his
stomach should be, and imitated by putting the orange in your
stomach. It proves I'm right about the Being--glug!" With a loud
belch, Pillbot broke off. He stared blankly at Harper, then his
hands slowly came up to clutch at his stomach.

Harper looked quickly at the desk top.

"The other orange," he gasped. "It's gone!"

"Into--my--stomach!" groaned Pillbot. "Be--be careful what you
do! My God, don't do anything. Don't even think. This--this four
dimensional creature will surely imitate whatever you do in some
weird manner."

Rubbing his stomach, Pillbot glanced about at the various
articles of furn