Calhoun was right. The Med Ship made its final approach to Weald under Calhoun's own control. He'd made brightness-measurements on his previous journey and he used them again. They would not be strictly accurate, because a sunspot could knock all meaning out of any reading beyond two decimal places. But the first breakout was just far enough from the Wealdian system for Calhoun to be able to pick out its planets with electron telescope at maximum magnification. He could aim for Weald itself,--allowing, of course, for the lag in the apparent motion of its image because of the limited speed of light. He tried the briefest of overdrive hops, and came out within the solar system and well inside any watching patrol. That was pure fortune. It continued. He'd broken through the screen of guard-ships in undetectable overdrive. He was within half an hour's solar-system drive of the grain-fleet. There was no alarm, at first. Of course radars spotted the Med Ship as an object, but nobody paid attention. It was not headed for Weald. It was probably assumed to be a guard-boat itself. Such mistakes do happen. It reached the grain-fleet. Again from the storage-space from which supplies had been removed, Calhoun produced vacuum suits. The four first students went out, each escorting a less-accustomed neophyte and all fastened firmly together with space-ropes. They warmed the interiors of four ships and went on to others. Presently there were eight ships making ready for an interstellar journey, each with a scared but resolute new pilot familiarizing himself with its controls. There were sixteen ships. Twenty. Twenty-three. * * * * * A guard-ship came humming out from Weald. It would be armed, of course. It came droning, droning up the forty-odd thousand miles from the planet. Calhoun swore. He could not call his students and tell them what was happening. The guard-ship would overhear. He could not trust untried young men to act rationally if they were unwarned and the guard-ship arrived and matter-of-factly attempted to board one of them. Then he was inspired. He called Murgatroyd, placed him before the communicator, and set it at voice-only transmission. This was familiar enough, to Murgatroyd. He'd often seen Calhoun use a communicator. "_Chee!_" shrilled Murgatroyd. "_Chee-chee!_" A startled voice came out of the speaker. "_What's that?_" "_Chee_," said Murgatroyd zestfully. The communicator was talking to him. Murgatroyd adored three things in order. One was Calhoun. The second was coffee. The third was pretending to converse like a human being. The speaker said explosively; "_You there, identify yourself!_" "_Chee-chee-chee-chee!_" observed Murgatroyd. He wriggled with pleasure and added, reasonably enough, "_Chee!_" The communicator bawled; "_Calling ground! Calling ground! Listen to this! Something that ain't human's talking at me on a communicator! Listen in an' tell me what to do!_"