"You are a good officer, lieutenant," said Hal. "I shall see that General Knoff hears of your vigilance."

"Thank you, captain. Is there anything I may do for you before you proceed on your journey?"

"Nothing, thanks. Then with your permission, lieutenant, we shall continue our interrupted journey."

Hal turned again toward the car. Chester and Stubbs followed him.

"Quickly, now," said Hal in a low voice. "His suspicions may be aroused again. We've no time to lose."

Again Chester and Stubbs clambered into the back seat.

"All right?" asked Hal, after he had taken his seat.

"All right," said Chester.

"Let her go, Hal," cried Stubbs in English.

And these words almost caused their undoing.