al.

"By George!" exclaimed Chester suddenly.

"What is it now?" demanded Hal.

Chester did not reply immediately. He appeared to be thinking deeply.

"Have you a knife?" he asked at length.

Hal produced one, and, taking it from his friend's hand, Chester
stepped to the back of the tent. Quickly he opened the blade, and made
a neat incision in the canvas, finally cutting out a little square.
Then he put his eye to the hole and peered out.

There was no one in sight. The guard could be heard pacing to and fro
in front of the tent, but apparently there was no guard at the rear.

Chester left his peep-hole and returned to Hal's side.

"If we can get two of these bicycles out here," he whispered, "we may
be able to get away by a quick dash. Are you willing to take a
chance?"

"Sure," agreed Hal. "Anything is better than sitting here and waiting
for I know not what. But do you think we can make it?"

"Well, we can at least try. There doesn't seem to be a guard in the
rear. I am going to cut a big slit in the back. Then we'll slip the
bicycles through it, mount and make a dash."

"Good!" said Hal.

Quietly Chester slit the canvas in the rear of the tent, making a hole
large enough for a man to step through. Quietly the boys each selected
a bicycle and pushed it cautiously through the opening.

Once on the outside they drew a breath of relief.

"We'll have to depend on our luck now," whispered Chester. "Come on!"

The lads leaped into the saddles, and a moment later were speeding
through the heart of the German camp.

In the very boldness of their scheme lay a certain degree of safety,
for the sentinels on guard certainly did not look for two youths of
the allied armies to be riding through their midst.

They were not even challenged as they sped through the camp, turning
this way and that, and they had passed beyond the last row of tents
before a hubbub from the rear told them that their flight had been
discovered.

"We must be careful," cried Hal, as he rode his wheel close beside
Chester. "There is still the outpost to pass."

But they did not diminish their speed. Rather, if anything, they
pedaled faster; and then the outpost came into sight--a long line of
men, almost in front of them. Some were pacing to and fro, while
others sat upon the ground.

The riders were upon them before they knew it, and two flying bicycles
sped between the German troopers. A cry of "halt!" went unheeded, and
the Germ