the doctor here tells me it has 
gone somewhere else. It wasn't found in our room when we woke up. I 
think the Pirate found it and confiscated it. All our luggage, including 
the gas sample bottles, is gone." 
"That's all right. I arranged for that. The ship was brought down by an 
emergency pilot and he had instructions from father. He took care of 
the luggage so that no member of the pirate's gang could steal it. There 
might have been some of them in the ground crew. They'll be turned 
over to us as soon as we see the emergency man. I don't have to lie here 
any longer, do I, doctor?" 
"No, Dr. Arcot, you're all right now. I would suggest that for the next 
hour or so you take it easy to let your heart get used to beating again. It 
stopped for some two hours, you know. You'll be all right, however." 
 
II 
Five men were seated about the Morey library, discussing the results of 
the last raid, in particular as related to Arcot and Morey. Fuller, and 
President Morey, as well as Dr. Arcot, senior, and the two young men 
themselves, were there. They had consistently refused to tell what their 
trip had revealed, saying that pictures would speak for them. Now they 
turned their attention to a motion picture projector and screen that 
Arcot junior had just set up. At his direction the room was darkened; 
and he started the projector. At once they were looking at the three
dimensional image of the mail-room aboard the air liner. 
Arcot commented: "I have cut out a lot of useless film, and confined 
the picture to essentials. We will now watch the pirate at work." 
Even as he spoke they saw the door of the mail-room open a bit, and 
then, to their intense surprise, it remained open for a few seconds, then 
closed. It went through all the motions of opening to admit someone, 
yet no one entered! 
"Your demonstration doesn't seem to show much yet, son. In fact, it 
shows much less than I had expected," said the senior Arcot. "But that 
door seemed to open easily. I thought they locked them!" 
"They did, but the pirate just burned holes in them, so to save property 
they leave 'em unlocked." 
Now the scene seemed to swing a bit as the plane hit an unusually bad 
air bump, and through the window they caught a glimpse of one of the 
circling Air Guardsmen. Then suddenly there appeared in the air within 
the room a point of flame. It hung in the air above the safe for an 
instant, described a strangely complicated set of curves; then, as it hung 
for an instant in mid-air, it became a great flare. In an instant this 
condensed to a point of intensely brilliant crimson fire. This described a 
complex series of curves and touched the top of the safe. In an 
inconceivably short time, the eight-inch thickness of tungsto-iridium 
alloy flared incandescently and began to flow sluggishly. A large circle 
of the red flame sprang out to surround the point of brilliance, and this 
blew the molten metal to one side, in a cascade of sparks. 
In moments, the torch had cut a large disc of metal nearly free; 
seemingly on the verge of dropping into the safe. Now the flame left 
the safe, again retracting itself in that uncanny manner, no force 
seeming either to supply it with fuel or to support it thus, though it 
burned steadily, and worked rapidly and efficiently. Now, in mid-air, it 
hung for a second. 
"I'm going to work the projector for a few moments by hand so that you
may see this next bit of film." Arcot moved a small switch and the 
machine blinked, giving a strange appearance to the seemingly solid 
images that were thrown on the screen. 
The pictures seemed to show the flame slowly descending till it again 
touched the metal. The tungsto-iridium glowed briefly; then, as 
suddenly as the extinguishing of a light, the safe was gone! It had 
disappeared into thin air! Only the incandescence of the metal and the 
flame itself were visible. 
"It seems the pirate has solved the secret of invisibility. No wonder the 
Air Guardsmen couldn't find him!" exclaimed Arcot, senior. 
The projector had been stopped exactly on the first frame, showing the 
invisibility of the safe. Then Arcot backed it up. 
"True, Dad," he said, "but pay special attention to this next frame." 
Again there appeared a picture of the room, the window beyond, the 
mail clerk asleep at his desk, everything as before, except that where 
the safe had been, there was a shadowy, half visible safe, the metal 
glowing brightly. Beside it there was visible a shadowy    
    
		
	
	
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