By this time either some of the prisoners saw that there was a break in the cordon around them, or they realized that a great battle was putting their guards to flight, for some of them made a rush toward a side where there were no Germans, and succeeded in breaking out—no hard task since part of the fence was shattered by the explosion.

“Now's our chance,” cried Tom, though of course Jack could not hear this. “Harry may be among that bunch, and we want to get him and any others we can save.”

He started the aeroplane on its downward path, while Jack, guessing the object, got the machine gun ready for action, since there might be a squad of Germans ready to give battle on the ground.

Several other planes of the Allies, seeing what was going on, swooped to the aid of the two Americans, for there were no other of the Hun craft within sight now. All had been sent crashing down, or had drawn off.

On either side of the immediate sector which included the prison camp, the battle was still raging fiercely, mostly with success on the side of the Americans, though in places they suffered a temporary setback.

In the vicinity of the prison itself wild scenes were now being enacted. The prisoners were beginning to rise in force, for they saw freedom looming before them. There were fights between them and the guards, and terrible happenings took place, for the guards were armed and the prisoners were not. But as fast as some of the Germans fell they were stripped of their guns and ammunition, and the weapons turned by the prisoners against their former captors.

All this while Tom and Jack were descending in their plane. As yet they were uncertain whether they were to be able to rescue Leroy or not. They could not distinguish him at that height, though from the enthusiastic manner in which several of the newly liberated ones waved at the on-coming aeroplanes, it would seem that they were of that arm of the service, and appreciated what was about to happen.

Nearer and nearer to the ground flew Tom and Jack. And then, to their horror, they saw that several Germans had set up two machine guns to rake the prison yard, which was still filled with excited captives. The Germans were determined that as few as possible of their late captives should find freedom.

Tom acted on the instant, by sending the plane in a different direction, to enable Jack to use his machine gun. And Jack understood this, for, with a shout of defiance, he turned his weapon on the closely packed Germans around their machine guns.

For a moment they stood and some even tried to swerve the guns about to shatter the dropping aeroplane. But Jack's fire was too fierce. He wiped out the nest, and this danger was averted.