Rocky, moving north on the New Boston safeway, as he wormed his roller through the ever-thickening mass of panicky Titanians and terrified Earth colonists rushing to the safety of the Base was once again—for perhaps the hundredth time—trying to grasp that elusive half-thought which had lurked in the back of his brain ever since Colossus had broken free.

Something Grossman had said—Grossman who now cowered in a Patrol cell, far from the haughty, autocratic figure he had pretended to be—had brushed a spark in Rocky's mind. But now that spark had dulled, and Rocky could not recapture it. It had something to do with Colossus ... it suggested some means of combating....

"Damnation!"

The hordes of refugees had been parting like a flesh sea before him ever since he left the Fort gates. But now the numbers were becoming so great that he could not move the roller through them except at a crawl. He realized this, and gave up the unequal struggle. He called an Earthman to him.

"Here, you—can you drive a roller?"

"Yes, indeed, sir!"

"Then take this back to Colonel Graham at the Fort. Tell him Captain Russell is going ahead on foot."

The colonist stared at him strikingly. "You—do you mean you're going back toward the city, sir? But you can't do that! It—it's suicide. They say a huge monster, ten miles tall, is coming to smash the city to pieces—"

Rocky said tightly, "Never mind that now. You give my message to the Commandant—understand?" And he climbed from the car and forced his way against the tide, northward on foot.