information would not be vital, it didn't seem to Harry that it
was worth all the risk implied. But if, on the other hand, there
was some plan for a German invasion of England, then he would have
no difficulty in understanding it. Then knowledge of where to
strike, of what points were guarded and what were not, would be
invaluable.

"But what a juggins I am!" he said. "They can't invade England,
even if they could spare the troops. Not while the British fleet
controls the sea. They'd have to fly over."

And with that half laughing expression he got the clue he was
looking for. Fly over! Why not? Flight was no longer a theory,
a possibility of the future. It war, something definite, that had
arrived. Even as he thought of the possibility he looked up and
saw, not more than a mile away, two monoplanes of a well-known
English army type flying low.

"I never thought of that!" he said to himself.

And now that the idea had come to him, he began to work out all
sorts of possibilities. He thought of a hundred different things
that might happen. He could see, all at once, the usefulness Bray
Park might have. Why, the place was like a volcano! It might
erupt at any minute, spreading ruin and destruction in all
directions. It was a hostile fortress, set down in the midst of a
country that, even though it was at war, could not believe that
war might come borne to it.

He visualized, as the truck kept in its plodding way, the manner