"Right!" Hal agreed. "Here is a chance for us to do some good. We'll offer our services to this officer."

The lads had discarded their German uniforms soon after their return to the French lines and were again attired in regulation French costume, with which they had been provided. They now approached the French officer who was busy directing the disposition of his men.

"We would be glad, sir," said Hal, "if you would put us to work."

The officer glanced at them keenly.

"Officers, I perceive," he said. "Your names, please?"

The boys gave them.

"Good," said the Frenchman. "Lieutenant Paine, you shall take charge of the second floor. Lieutenant Crawford, you will command in the basement. I have orders to hold this position, come what may."

"Very good, sir."

The two boys saluted.

"To your posts, then!"