brother. "Who's that with you?"

"Hugh."

"Well, it seems to me you two are pretty nervy," said Harold testily.
"What are you doing down around here anyway?"

"We were going down to Brown's boathouse to see Hugh's canoe," Bob
explained. "We thought we'd take the short cut over the bridge."

"And stand a good chance of getting shot," said Harold. "All bridges
are guarded by soldiers with rifles, and we're not supposed to wait
forever before we shoot either." Hugh and Bob had advanced to the spot
where Harold was standing, and the three young men were grouped in a
small circle.

"We never thought of that," said Bob sheepishly.

"Don't you know the United States is at war?"

"Of course we do."

"Well, then--. Sssh!" hissed Harold suddenly.

He peered intently down the railroad track. The figure of a man could be
seen approaching. "Get back, quickly," whispered Harold, and the two boys
flattened themselves against one of the big steel girders.

Nearer and nearer came the man. Harold stood motionless, his gun half
raised and ready for instant action. Hugh and Bob looked on, fascinated.