After a while doubt started assailing him again, and Hart found himself returning almost against his will to the Library Building. Burnett greeted him cordially. "To-day's visit is completely legal," he said. "Anyone doing olden time research is automatically authorized if he has been here before."

"I hope my thought can be as legal," Hart blurted out. "Well—that was just a joke."

"Oh, I can recognize a joke when I hear one, my friend."

Hart went to his booth, feeling the man's eyes measuring him more intently than ever. It was almost a welcome relief to start reading the reference scanner once more.

But not for long. As the wider pattern unfolded, his anxiety state intensified.

It was becoming perfectly obvious that many, many replacements used to be made long before they were needed. And it was still true. I should not be thinking such thoughts, he told himself, I should be outside in the Plaza, being normal and human.

But he could see how it had come about, step by step. First there had been pressure from the ruling echelons, many of whose members only maintained their status through excessive production. Then, much more important, there had been the willful blindness of the masses who wanted to keep their cozy, familiar treadmills going.

He slammed down the off button and went out to the librarian's desk. "Do people want to work all the time," he said, "for the sake of work alone?"

He immediately regretted the question. But Burnett did not seem to mind. "You've only stated the positive reason, Mr. Hart. The negative one could be stronger—the fear of what they would have to do if they did not have to work much over a long period."

"What would it mean?"