"I guess that's it," agreed Ned. "Did you recognize any of the men, Tom?"

"No, I didn't see 'em as soon as you did, and when they were running they had their backs toward me. Was Simpson one?"

"I can't be sure. If one was, I guess he'll think we are keeping pretty closely after him, and he may give this part of the country a wide berth."

"I hope he does," returned Tom. "Do you know, Ned, I have an idea that these fellows—Schwen Simpson, and those back of them, including Blakeson—are trying to get hold of the secret of my tank for the Germans."

"I shouldn't be surprised. But you've got it finished now, haven't you? They can't get your patents away from you."

"No, it isn't that," said Tom. "There are certain secrets about the mechanism of the tank—the way I've increased the speed and power, the use of the spanners, and things like that—which would be useful for the Germans to know. I wouldn't want them to find out these secrets, and they could do that if they were in the tank a while, or had her in their possession."

"They couldn't do that, Tom—get possession of her—could they?"

"There's no telling. I'm going to be doubly on the watch. That fellow Blakeson is in the pay of the plotters, I believe. He has a big machine shop, and he might try to duplicate my tank if he knew how she was made inside."

"I see! That's why he was inquiring about a good machinist, I suppose, though he'll be mightily surprised when he learns it was you he was talking to the time your Hawk met with the little mishap."

"Yes, I guess maybe he will be a bit startled," agreed Tom. "But I haven't seen him around lately, and maybe he has given up."