"Try to get to the Polaris," replied Tom. "Then we'll hunt for the professor. If we don't find him, we're sunk. He's the key to the whole thing."

Astro and Roger had tumbled out the window and were racing toward the safety of the near-by hills. Tom gave Jeff a final handshake and dived out the window after them. Running toward the clump of bushes where Astro and Roger had just disappeared, he dived for cover, just as Vidac's car roared into the clearing. The boys saw Vidac and Bush get out of the car, and after inspecting Jeff's, turn and stride into the house.

"Come on," said Tom. "We've got to get to the Polaris!"

The three boys turned away and hurried from the farm. In a few minutes, after scrambling to the top of the nearest hill, they turned back to look down on the farmhouse and saw Jeff escorting Jane to his car.

"So far so good," said Tom. "Let's go."

They walked off and were soon lost in the tangle of scrub grass and dry gullies, their destination the Polaris and the solution to the mystery of Professor Sykes's disappearance.


CHAPTER 19

Strong's plan to follow Vidac in order to locate Hardy had paid off. While Vidac and Bush were rounding up citizens of Roald City and sending them out to search for the Space Cadets, the Solar Guard captain had checked the frequency setting on the communicator in the lieutenant governor's jet car. Then hiding in Professor Sykes's laboratory, Strong tuned the lab communicator to the same frequency and waited. He knew he was taking a chance. Vidac might not contact the governor on that setting if he contacted the governor at all, but there was no other way at the moment. Strong waited three hours before hearing the click of Vidac's communicator on the laboratory speaker.