Nodding, the astro-navigator ran back to the ship. The teletron was a new gadget, invented just before the expedition left earth. Far from perfection as yet, it was intended to aid in establishing telepathic communication between persons who had no common language. Sometimes it worked, a little. More often it didn't. But it might be useful here. Ron Val was panting when he returned with it. "Are you going to talk to them, Jed?" "I'm going to try." The four figures approached. Hargraves smiled. That was to show his good intentions. A smile ought to be common language everywhere. The four strangers did not return his smile. They just stopped and looked at him with no trace of emotion on their faces. [Illustration: What strange thing was this? Who were these people and what was their power?] They looked human. They weren't, of course. Parallel evolution accounted for the resemblance, like causes producing like results. Nielson was watching them like a hawk. Without making an aggressive move, the way he held his gun showed he was ready to go into action at a moment's notice. Behind them, the ship was silent, its crew alert. Hargraves bent to manipulate the complicated tuning of the teletron. "I am Thulon," a voice whispered in his brain. "No need for that." Jed Hargraves' leaped to his feet. He caught startled glances from Ron Val and Nielson and knew they had heard and understood too. Understood, rather. There had been nothing for the ears to hear. "Thulon! No need for--_I understood you without_--" Thulon smiled. He was taller than the average human, and very slender. "We are natural telepaths. So there is no need to use your instrument." "Uh? Natural telepaths! Well, I'm damned!" "Damned? I cannot quite grasp the meaning of the word. Your mind is radiating on an emotional level. Do you wish to indicate surprise? I cannot grasp your thinking." Hargraves choked, fought for control of his mind. For a minute it had run away with him. He brought it to heel. "What are you doing here?" Thulon asked. * * * * * Hargraves blinked at the directness of the question. They certainly wasted no time getting down to business. "We--" He caught himself. No telling how much they could take directly from his mind! "We came from--far away." He tried to force his thoughts into narrow channels. "We--" "There is no need to be afraid." Thulon smiled gently. Or was there wiliness in that smile? Was this stranger attempting to lure him into a feeling of false security? "I meant, what are you doing _here_?" Thulon continued. His eyes went down to the ground. There was only one shovel on the ground. One shovel was all there had been in the ship. Thulon's glance went to it, went on.