Chapter
7
I KNEW THAT THE SOUND-DETECTORS were already giving warning of the approach of a ship, and of a Kapar ship, too; for our ships are equipped with a secret device which permits the detectors to recognize them. The signal that it gives can be changed at will, and is changed every day, so that it really amounts to a countersign. Watchers must be on the alert for even a single ship, but I was positive that they would be looking up in the air; so I hugged the ground, flying at an elevation of little more than twenty feet.
Before we reached the mountains which surround Orvis, I saw a squadron of pursuit planes come over the summit.
"They are looking for us," I said to Bantor Han, who was in the after cockpit, "and I'm going right up where they can see us."
"You'll come down in a hu
