Colonel Anderson was no less surprised, but he did not hesitate; and closely bunched the four turned to the right and ran for their lives.

Men sprang up on all sides now; and it seemed impossible that the four could escape. But fortune favored them.

Swerving suddenly again, Hal, who was in the lead, stopped short, and uttered a cry of pure dismay. The way ahead was blocked. There seemed no way out; and then Chester cried:

"An aeroplane hangar!"

It was true. Fortune had guided their footsteps to possibly the only place in the whole Austrian camp where there was a chance of escape.

Hal wasted no time. Rapidly he mounted the hangar, the others following him closely. The lad uttered a short prayer as he climbed and then gave a great sigh of relief. He had feared there would be no air craft there, but, and Hal cried his relief aloud, there was.

He glanced at the machine quickly and uttered another cry of joy as he made out that the craft was exceptionally large, capable of seating at least ten men, and the additional fact that it was a self starter.

"Climb in quick!" he shouted, leaping into the pilot's seat and taking the wheel.

The others followed this command with all despatch, and Chester took his place at the motor.

"Let 'er go, Chester!" shouted Hal.