The first they had heard of the strangers from outer space was when the new ultra short-wave frequencies were used. Professor Kennicot of Palmira University was the first to find how to generate and control them. He tried to transform the wavelengths upward to a range either auditory or visual but for some reason power was lost in the process. Apparently he gave them a sufficient jolt with extra voltage, however, because they were picked up by the strangers in outer space as a signal. The heaviside layer did not stop these wavelengths. Professor Kennicot was startled one day when he heard, or thought he heard, a soundless voice in his mind. It said: "Interesting. We didn't know there was life on your planet or in your solar system." Professor Kennicot shook his head and looked around. Nobody was in the laboratory. "Of course," said the voice, "We detected atomic radiations from the area, but Zeetal thought it might come from your sun. Tell us, please, are you a Grade Three society?" "My God," muttered Professor Kennicot. "I'm having hallucinations." "There seems to be some difficulty establishing telepathic communication," came the puzzled thought. And then, after a pause, "Could it be we're in communication with creatures of zero grade?" Another thought from elsewhere answered, and yet Professor Kennicot, somewhat, was tuned in: "Impossible. The signal picked up was very close to telepathic frequency." It wasn't until two days later that Professor Kennicot discovered that he wasn't the only one who had experienced the auditory hallucination. The entire college was babbling about how Professor Johnson had come running out of the Chemistry Lab, which was two doors away from Physics, holding his head and babbling nonsense. Professor Kennicot made a beeline for the hospital and had a quiet discussion with Professor Johnson, a discussion which is now historic. They discovered that not only were both their I.Q.s over one hundred and eighty, but that both of them, sitting together discussing the matter, were simultaneously getting new messages which nobody around them was receiving. It wasn't long after that, of course, that many of the most brilliant men on Earth were reporting the same hallucinations, and as news of it spread it became obvious that not all could be insane in exactly the same way with the same thoughts. Excitement and puzzlement ran tremendously high because, although these intellects of Earth could receive telepathic messages, they were not advanced enough to send. They only knew what was being messaged to them; and this continued to be so until feverishly working physicists pinned down the telepathic wavelength mechanically. That was when conversations were begun and the entire Earth was able to listen in, by translation and regular broadcast.