blow from the closest of his assailants, and, stepping in
close, struck him with all his power under the chin. The youth fell to
the ground.

As he did so the ruffian nearest him, with a hiss of rage, drew a knife,
with which he made a wicked slash at Hal. Hal did not see the movement,
being closely pressed elsewhere, but Chester, with a sudden cry, leaped
forward and seized the hand holding the knife, just as the weapon would
have been buried in Hal's back.

"You would, would you, you coward!" he cried, and struck the young German
in the face with all the strength of his right arm. The latter toppled
over like a log.

All this time the crowd of assailants continued to grow. Attracted by the
sounds of the scuffle, reinforcements arrived from all directions, and it
is hard to tell what would have happened had not the sudden blast of a
whistle interrupted the proceedings.

"The police!" yelled someone in the crowd. "Run!"

In less time than it takes to tell it, Hal, Chester, and the two other
young men were alone, while racing toward them, down the street, were
several figures in uniform.

"Run!" cried the young Frenchman. "If they catch us we will all go to
jail, and there is no telling when we'll get out. Run!"

The four took to their heels, and, dodging around corner after corner,
were soon safe from pursuit.

"Well, I guess we are safe now," said the Englishman, when they stopped
at last. Then, turning to Hal:

"I don't know how to thank you and your friend. If you had not arrived
when you did, I fear it would have fared badly with us."

"No thanks are due," replied Hal. "It's a poor American who would refuse
to help anyone in trouble. Shake hands and call it square!"

The Englishman smiled.

"As modest as you are bold, eh? Well, all right," and he extended his
hand, which Hal and Chester grasped in turn.

But the Frenchman was not to be put off so easily. He insisted on
embracing both of the boys, much to their embarrassment.

"I'm Lieutenant Harry Anderson, of the Tenth Dragoons, His Majesty's
service," explained the Englishman, and then, turning to his friend:
"This is Captain Raoul Derevaux, Tenth Regiment, French Rifle Corps. We
were strolling along the street when attacked by the gang from which you
saved us. In the morning we shall try to get out of Germany by way of the
Belgian frontier. If now, or at any other time, we may be of service to
you, command us."

"Yes, indeed," put in the Frenc