“Now, listen,” Manship began shouting in desperation. “Can you or can you not hear me?”

“You can shut off the power, Srin,” Professor Lirld commented. “No sense in wasting it. I believe we have as much of this creature as we need. If any more of it is due to materialize, it will arrive on the residual beam.”

The flefnobe on Manship’s left rapidly spun the strange spheroid he was holding. A low hum, which had filled the building and had been hardly noticeable before, now died away. As Srin peered intently at the patches of light on the surface of the instrument, Manship suddenly guessed that they were meter readings. Yes, that’s exactly what they were—meter readings. Now, how did I know that? he wondered.

Obvious. There was only one answer. If they couldn’t hear him no matter how loudly he shouted, if they gave no sign that they even knew he was shouting, and if, at the same time, they seemed to indulge in the rather improbable feat of talking his native language—they were obviously telepaths. Without anything that looked like ears or mouths.

He listened carefully as Srin asked his superior a question. It seemed to sound in his ears as words, English words in a clear, resonant voice. But there was a difference. There was a quality missing, the kind of realistic bite that fresh fruit has and artificial fruit flavoring doesn’t. And behind Srin’s words there were low, murmuring bubbles of other words, unorganized sentence fragments which would occasionally become “audible” enough to clarify a subject that was not included in the “conversation.” That, Manship realized, was how he had learned that the shifting patches of light on the spheroid were meter readings.