"But," said the Engineer, "that would do no good.”
"It would," said Gary, grimly, "if they could use the laws of space to form a blister on the surface of their universe. If they could go out to the very edge of their space-time frame and create a little bubble of space — a bubble that would pinch off, independent of the parent universe and exist independently in the five-dimension inter-space.”
Gary heard the rasp of Kingsley's breath in his helmet phones.
"They could cross to our universe," rumbled the scientist. "They could navigate through the inter-space with complete immunity.”
Gary nodded inside his helmet. "Exactly," he said.
"Why, Gary," whispered Caroline, "what a thought!”
"Boy," said Herb, "I can hardly wait to see them Hellhounds when we sic those fellows on them.”
"Maybe," said Tommy, "they won't come.”
"I will talk to them," said the Engineer.
He left the room and they followed him through a mighty corridor to another room filled with elaborate machinery.