crossed thirty light years if we don't land on a world when we find one? This is an exploring expedition—" Hargraves saw that he had no listener. Ron Val had listened only long enough to learn what he wanted to know, then had dived back to his beloved telescope to watch the world spiraling up through space toward them. That world meant a lot to Ron Val, the thrill of discovery, of exploring where a human foot had never trod in all the history of the universe. New lands in the sky! The Third Interstellar Expedition—third because two others were winging out across space, one toward Sirius, the other toward Cygnus—was approaching land! The fact also meant something to Jed Hargraves, possibly a little less than it did to Ron Val because Hargraves had more responsibilities. He was captain of the ship, commander of the expedition. It was his duty to take the ship to Vega, and to bring it safely home. Half of his task was done. Vega was bright in the sky ahead and the tough bubble of steel and quartz that was the ship was dropping down to rest on one of Vega's planets. Hargraves started to leave the nook that housed Ron Val and his telescope. The ship's loudspeaker system shouted with sudden sound. "Jed! Jed Hargraves! Come to the bridge at once." That was Red Nielson's voice. He was speaking from the control room in the nose of the ship. Nielson sounded excited. Hargraves pushed a button under the loudspeaker. The system was two-way, allowing for intercommunication. "Hargraves speaking. What's wrong?" "A ship is approaching. It is coming straight toward us." "A ship! Are you out of your head? This is Vega." "I don't give a damn if it's Brooklyn! I know a space ship when I see one. And this is one. Either get up here and take command or tell me what you want done." Discipline among the personnel of this expedition was so nearly perfect there was no need for it. Consequently there was none. Before leaving earth, skilled mental analysts had aided in the selection of this crew, and had welded it together so artfully that it thought, acted, and functioned as a unit. Jed Hargraves was captain, but he had never