Obviously they had it, down there on the pleasant, cloud-flecked, green and blue planet. Science! White, towering cities whose spires were laced by flying bridges—and inexplicably decorated with something that looked like cooling fins. Huge superstreamlined vehicles lazily coursing the roads and skies. Long, linked-pontoon cities slowly heaving on the breasts of the oceans. Science!

Ross said reverently, “We’re here. Flarney was right. Helena, Bernie, Doc—maybe this is the parent planet of us all and maybe it isn’t. But the people who built those cities must know all the answers. Helena, will you please land us?”

“Sure, Ross. Shall I look for a spaceport?”

Ross frowned. “Of course. Do you think these people are savages? We’ll go in openly and take our problem to them. Besides, imagine the radar setup they must have! We’d never sneak through even if we wanted to.”

Helena casually fingered the controls; there was the sickening swoop characteristic of her ship-handling, several times repeated. As she jerked them wildly across the planet’s orbit she explained over her shoulder, “I had the darnedest time finding a really big spaceport on that little radar thing—oops!—but there’s a nice-looking one near that coastal city. Whee! That was close! There was one—sorry, Ross—on a big lake inland, but I didn’t like——Now everybody be very quiet. This is the hard part and I have to concentrate.”

Ross hung on.

Helena landed the ship with her usual timber-shivering crash. “Now,” she said briskly, “we’d better allow a little time for it to cool down. This is nice, isn’t it?”

Ross dragged himself, bruised, from the floor. He had to agree. It was nice. The landing field, rimmed by gracious, light buildings (with the cooling fins), was dotted with great, silvery ships. They didn’t, Ross thought with a twinge of irritation, seem to be space vessels, though; leave it to Helena to get them down at some local airport! Still—the ships also, he noticed, were liberally studded with the fins. He peered at them with puzzlement and a rising sense of excitement. Certainly they had a function, and that function could only be some sort of energy receptor. Could it be—dared he imagine that it was the long-dreamed-of cosmic energy tap? What a bonus that would be to bring back with him! And what other marvels might this polished technology have to give them....

Bernie distracted him. He said, “Hey, Ross. Here comes somebody.”

But even Bernie’s tone was awed. A magnificent vehicle was crawling toward them across the field. It was long, low, bullet-shaped—and with cooling fins. Multiple plates of silvery metal contrasted with a glossy black finish. All about its periphery was a lacy pattern of intricate crumples and crinkles of metal, as though its skirts had been crushed and rumpled. Ross sighed and marveled: What a production problem these people had solved, stamping those forms out between dies.