At the sound of the German's shot, Hal increased the speed of the
automobile.

"McKenzie!" he cried.

McKenzie leaned forward so as to catch the words the lad shouted back
to him.

"Get your guns ready!" cried Hal. "Don't let anyone come at us from
the rear."

McKenzie understood. He repeated Hal's words to Stubbs, shouting to
make himself heard.

"Can't anyone catch us from behind," Stubbs shouted back. "This car
will outrun anything in Germany."

McKenzie made no reply, but looked to his guns. He knew that it was
not pursuing automobiles that Hal was afraid of; but high-powered
motorcycles in use in Germany would probably be able to overtake the
car no matter what its speed.

So far, however, the road behind was clear.





CHAPTER X