"They seem nowadays to take a savage delight in bombing hospitals, and then finding all sorts of excuses for doing such a thing," he told Tom. "I declare, they put me in mind of a cruel wolf more than anything else."

"On my part," his companion immediately asserted, "I'd liken them to a mad dog, snapping and snarling as he runs along the street, but it shows how desperate they feel their cause to be."

"Guess you're right, Tom. I humbly apologize to the wolf," chuckled the other quickly. "He's had a bad name out West, but on the whole those cow-punchers must call him a clean fighter alongside some of these Huns."

"Well, here we are at the field," observed Tom. "Now I'm waiting to be shown, if I'm not from Missouri. And, Harry, understand that I'm open to conviction. If I find that you've got something wonderful here, I'll frankly acknowledge the fact, and eat humble pie."

"I know you will. That's why I'm so eager to show you what a fine thing my friend Jason has got up in this little trick. My hangar lies over this way. Come along and——"

Harry stopped in the middle of the sentence, stopped walking too, and laid a hand on his companion's arm.

"What did you see?" asked Tom in a whisper; for somehow he sensed the fact that Harry had made some sort of discovery calculated to thrill them both.

"Stand still, Tom!" hissed the other. "I didn't like the way that chap dodged down over there. Couldn't have been one of the guards, for they stick to their posts. I wonder now if one of those Boche planes dropped a spy close to our field here!"

The idea was in line with Tom's reasoning. According to his mind the Germans were getting desperate, and ready to attempt the rashest of enterprises in the hope of checking this daily advance of the Yankees under Pershing.

As much of the success of the latter depended on the work of their flying squads in discovering the hidden machine-gun nests, and betraying their position to the gunners, it stood to reason that the Germans felt an ever growing hatred toward the airmen. Hence that night raid which had been so neatly parried. Yes, Tom could easily believe what his comrade suggested.