And it was not long afterward that Vincent was examining cuneiform tablets in the State Museum. These were a broken and not continuous series on the theory of numbers, tolerably legible to the now encyclopedic Charles Vincent. And the series read in part:

“On the divergence of the basis itself and the confusion caused—for it is five, or it is six, or ten or twelve, or sixty or a hundred, or three hundred and sixty or the double hundred, the thousand. The reason, not clearly understood by the people, is that Six and the Dozen are first, and Sixty is a compromise in condescending to the people. For the five, the ten are late, and are no older than the people themselves. It is said, and credited, that people began to count by fives and tens from the number of fingers on their hands. But before the people the—by the reason that they had—counted by sixes and twelves. But Sixty is the number of time, divisible by both, for both must live together in time, though not on the same plane of time—” Much of the rest was scattered. And it was while trying to set the hundreds of unordered clay tablets in proper sequence that Charles Vincent created the legend of the ghost in the museum.

For he spent his multi-hundred-hour nights there studying and classifying. Naturally he could not work without light, and naturally he could be seen when he sat still at his studies. But as the slow-moving guards attempted to close in on him, he would move to avoid them, and his speed made him invisible to them. They were a nuisance and had to be discouraged. He belabored them soundly and they became less eager to try to capture him.

His only fear was that they would some time try to shoot him to see if he were ghost or human. He could avoid a seen shot, which would come at no more than two and a half times his own greatest speed. But an unperceived shot could penetrate dangerously, even fatally, before he twisted away from it.

He had fathered legends of other ghosts, that of the Central Library, that of University Library, that of the John Charles Underwood Jr. Technical Library. This plurality of ghosts tended to cancel out each other and bring believers into ridicule. Even those who had seen him as a ghost did not admit that they believed in the ghosts.

He went back to Dr. Mason for his monthly checkup.

“You look terrible,” said the Doctor. “Whatever it is, you have changed. If you can afford it, you should take a long rest.”

“I have the means,” said Charles Vincent, “and that is just what I will do. I’ll take a rest for a year or two.”

He had begun to begrudge the time that he must spend at the world’s pace. From now on he was regarded as a recluse. He was silent and unsociable, for he found it a nuisance to come back to the common state to engage in conversation, and in his special state voices were too slow-pitched to intrude into his consciousness.

Except that of the man whose face he had never seen.