Overnight, it seemed to Grey, Terra flew into a turmoil of mobilization, manufacture of spaceships and weapons, research for the creation of new weapons and new defenses against the strange attack methods of the enemy. In the tiny circle of existence in which he walked, that which he observed was the increased crowds of people on their way to work in the factories, the increased difficulty of buying various items, and inevitably the card which had ordered him to the mobilization center. Among the many classification tests which they gave Grey was a curious one which seemed nonsensical until later on in the course of his training its purpose became quite obvious. It was given by a young man with very large and quiet eyes, who was seated beside an individual with soft, silky fur that changed color from moment to moment, and whose antennae had a fascinating, restless mobility. The four tentacles were brown and graceful, while the total attitude of the creature was one of repose and dignity. Grey stared at this personage with curiosity, and with a slight chill. From photographs he knew the form of the natives of the fourth planet of Canopus, and from rumors and bar-room tales he had heard sufficient concerning them to ring a note of alarm in his brain. Yet, as he sat there for a moment, the alarm died away for although to his untrained eyes the Canopan was practically featureless, there was an aura of pleasantness about it appearing from a source which at that time he was not able to identify. Into his mind the thought came, "What if they can read my mind, like everybody says? He doesn't look like he would hurt me. But...." The voice of the examiner cut his thoughts short. "Here are ten cards lying face down on the table. Tell me what markings are on the front of these cards." "But how can I tell you if the cards are face down?" The man smiled. "Just try, anyway." Grey wanted to snort and laugh in the man's face; but then suddenly he shivered, for actually he knew.... "Why there's a circle, a square, a triangle, another circle...." Then there was a sealed box in which he identified a cube, a sphere, a cylinder, and a more difficult object which turned out to be a key.