how to get rid of it. As I said, I think we shall have to depend on you airmen."
"Well, we're for the job!" exclaimed Tom.
"I know you are. And it may fall to you, or to your friends. I will talk of that later."
"Have you been able to get any idea of the kind of gun it is, or why it fires at fifteen minute intervals?" asked Jack.
"We have been able to get no really reliable information save that which we deduce by our observations of this shell and from what we know of the location of our own and the German lines," the Major went on. "Up to now our airmen have not been able to penetrate far enough without being attacked, and such few as did get well over toward the Rhine could make out nothing. I have no doubt the gun is well camouflaged."
"And is it true that it doesn't fire at night because the Germans are afraid the flashes will be seen?" asked Tom.
"That may have been the reason at first, but they have fired at night, of late, so they must have some way of concealing the flashes, or perhaps setting off other flashes at the same time so as to confuse our scouts."
"It's going to be some job," murmured Jack.
"You said something," agreed his chum.
They remained talking a little longer, and
