"Not that I know of." Simon chuckled. "But human sense organs are amazingly good. It only takes three or four quanta to stimulate the visual purple—a little more actually because of absorption by the eyeball itself. There have been hysterics who could hear a watch ticking twenty feet away that the normal person could not hear at one foot. And so on.
"There are excellent reasons why the threshold of perception is relatively high in ordinary people—the stimuli of usual conditions would be blinding and deafening, unendurable, if there weren't a defense." He grimaced. "I know!"
"But the telepathy?" Elena persisted.
"It's been done before," he said. "Some apparent cases of mindreading in the last century were shown to be due to extremely acute hearing. Most people sub-vocalize their surface thoughts. With a little practice a person who can hear those vibrations can learn to interpret them. That's all." He smiled with one side of his mouth. "If you want to hide your thoughts from me just break that habit, Elena."
She looked at him with an emotion he could not quite recognize. "I see," she breathed. "And your memory must be perfect too, if you can pull any datum out of the subconscious. And you can—do everything, can't you?"
"No," he said. "I'm only a test case. They've learned a great deal by observing me but the only thing that makes me unusual is that I have conscious control of certain normally subconscious and involuntary functions. Not all of them by a long shot. And I don't use that control any more than necessary.
"There are sound biological reasons why man's mind is so divided and plenty of penalties attached to a case like mine. It'll take me a couple of months to get back in shape after this bout. I'm due for a good old-fashioned nervous breakdown and while it won't last long it won't be much fun while it does last."
The appeal rose in his eyes as he watched Elena. "All right," he said. "Now you have the story. What are you going to do about it?"
For the first time she gave him a real smile. "Don't worry," she said, "Don't worry, Simon."
"Will you come hold my hand while I'm recuperating?" he asked anxiously.