"You must be crazy," Mortenson gasped weakly. "You could never make use of it!"
The intruder grunted and Mortenson heard the click of the safety catch as the man's thumb slid along the side of his automatic.
"That's where you come in!" he said curtly. "You're going to see that I can make use of it."
"What do you mean?" the scientist asked innocently.
"You know what I mean!" the man hissed sharply. "Don't try to pull that innocent stuff on me. You're going to hand over your Fifth Dimensional apparatus with instructions on how to use it. Now hop!"
"You don't know what you're doing," Mortenson argued desperately. "You must be insane!"
"Don't I?" the man jeered. "What do you think I came here for?"
"The apparatus, of course," said Mortenson, glancing about him furtively in search of a handy hammer or a weapon, "but, good Lord, man, you must be fond of trouble!"
"I'm used to it!" the intruder snarled. "And I'm giving you two minutes to hand it over!"
"That interview did not tell what actually exists in the Fifth Dimension," the scientist said dryly. "It's a terrible, invisible world filled with strange beasts that would tear a man to pieces, should he be caught there."