"We are glad," said the Engineer. "We have tried so hard to make it easy for you. We are grateful that you came. Without you we never would have saved the universe. We never would have gone to Old Earth to find the secret of the energy, because we are not driven by restless imagination…

an imagination that will not let one rest until all has been explained.”

"We did what we could," rumbled Kingsley. "But all of the credit goes to Caroline. She was the one who worked out the mathematics for the creation of the hypersphere. She is the only one of us who would have been able to understand the equations relating to the energy and the inter-space.”

"You are right," said the Engineer, "and we thank Caroline especially. But the rest of you had your part to do and did it. It has made us very proud.”

"Proud," thought Gary. "Why should he be proud of anything we've done?”

The Engineer caught his thought.

"You ask why we should be proud," he said, "and I shall tell you why. We have watched and studied you closely since you came, debating whether you should be told what there is to tell. Under different circumstances we probably would allow you to depart without a word, but we have decided that you should know.”

"Know what?" thundered Kingsley.

The rest of them were silent, waiting.

"You are aware of how your solar system came into being?" asked the Engineer.