here, though I don't believe the spies know my mission. However, it is best to be careful. With your permission I'll pull down the shade. There may be spies stationed across the street who, with powerful glasses, might look through the window and gather something of what we say by reading our lips. It has been done."
"The Germans don't leave much untried," commented Tom. "But what is it you want us to do, if it isn't trying to trail the spy?"
The major motioned them to draw closer to him, and then, leaving the door into the hall open, so that he could note the approach of any one, he whispered:
"You are to be two members of a picked company of air scouts who are to go out, discover the big German gun, and destroy it!"
"Whew!" whistled Tom, after a moment of thought during which he and Jack exchanged quick glances.
"Well?" asked the officer. "How does that strike you? I believe that is another of your captivating terms?"
"It's all to the good!" exclaimed Jack. "What say, Tom? We'll take that on, won't we?"
"Well, I should say!" was the enthusiastic rejoinder. "When do we start to—"
"Hush!" cautioned the major. "Not so loud
