“Do just whatever you want to, boys,” he had remarked, after they had received the receipt for the freight, and paid the charges all the way through, with some of the cash that wonderful check had been exchanged for after Andy had written his full name across the back; “but I rather think you’ll have all your trouble for your pains. As for me, I’ve got a few important things to work at tonight, and so, if you don’t mind, I’ll spend the time in the shop. Good luck to you all! Let me know the first thing in the morning if everything’s O.K.” With that Frank swung around on his heel and strode away.

“How about that, Andy,” demanded Larry, when they saw Frank vanish beyond the open door of the freight shed; “is he really giving us the hook because we think it best to watch the blooming freight tonight, for fear that tricky Perc Carberry and his man Friday, I mean Sandy, swoop down upon it, and do something to make your fine airship good only for the scrap-heap?”

Andy laughed as he replied:

“You just don’t know Frank as well as I do,” he observed. “Chances are that if we hadn’t set up that howl about being afraid something was going to happen here, my cousin would have quietly sneaked along this way after dark, and stood on guard the whole blessed night.”

“What’s that you say, Andy, and he just laughed at us too? I didn’t think Frank had it in him to play a joke like that,” exclaimed Elephant, looking hurt.

“Well,” went on Andy Bird, “you see he knew we were bent on keeping guard here, and Frank does hate to see anybody disappointed; so he just let us have our own way about it. And then when he said he had something important to do at our shop, he spoke the truth; because he’s right now on the heels of a discovery that may mean a whole lot to us.”

“All right,” remarked Larry. “We’re only too glad to let Frank off, and run the whole shooting match ourselves, for once. Now, how shall we fix it so every fellow can get home to supper, and yet keep tab on what’s going on here all the while?”

This was very easily adjusted, however. They left Larry on guard, because he said his folks had supper later than the rest; and both Elephant and Andy promised to hurry back as soon as they could get enough to eat; and let their folks know just why they did not expect to occupy their beds that night.

This plan worked all right.

When the two boys turned up together, one having called for the other, of course the first thing they asked Larry was whether anything had happened; perhaps their sharp eyes detected the fact that he looked somewhat excited, and they judged that this could hardly be unless he had seen something suspicious.