“He made a regular pig of himself, but we knew he would, and that’s why we had such confidence in him,” said Joe.
“Nothing of the kind!” protested Jimmy. “You know you fellows got me into it in the first place. You fixed it all up, and I only went in as a favor to you. But I might know better than to expect gratitude from this bunch.”
“You’ll find it in the dictionary,” Joe informed him. “You ought to be grateful to us for providing you with a feed like that. It would have cost you a lot of money to buy all those pies back home.”
“I think he came well out of it, at any rate,” interposed the radio man. “But we must now be getting somewhere near that cabin, and we’d better go as quietly as we can. We know that there are two of the gang hanging out in it, and there’s no telling how many more there may be.”
“Not so very near the cabin yet,” answered Bob. “Nearer that tree to which they had the receiving set attached.”
Nevertheless, they advanced as silently as possible, keeping a sharp lookout for any sign of the black-moustached stranger and his friend. The woods seemed devoid of human presence other than their own, however, and they saw nothing to arouse suspicion until at length they reached the tree to which the receiving set was fastened. Frank Brandon examined this with interest. The box was securely locked, but the radio man drew a big bunch of various-sized keys from his pocket.
“I want to see what’s in this box, but first I think we’d better post sentries,” he said, in a low voice. “Suppose you go back a few hundred feet the way we came, Jimmy. You go the same distance in the other direction, Herb. And Joe can go a little way up the path that leads toward the cabin. You can stay here and help me get this box open, Bob. If any of you hear some one coming, imitate a robin’s note three times, and then keep out of sight. We don’t want the crooks to suspect yet that anybody is on their trail.”
The three radio boys scattered to their appointed posts, and Frank Brandon proceeded to try key after key in the lock. He had to try fully a dozen before at last the lock clicked and the door of the box swung open.
Inside was a complete radio receiving set, with vacuum tube detector and batteries in perfect working order. Between the roots of the tree an iron pipe had been driven into the earth to act as a ground. The antenna was strung from top to bottom of the tree on the side away from the path, and there was nothing to differentiate the box from an ordinary wire telephone set, except that it was slightly larger. There were a number of regular wire telephones scattered throughout the woods, to aid in fighting forest fires, so that anybody traveling along the path would have been unlikely to give this outfit more than a passing glance, if they noticed it at all. Had the radio boys not chanced to see the black-moustached man listening, with wireless headphones over his ears, the fact that the box contained a wireless receiving outfit might never have been discovered.
Brandon and Bob went carefully over every article of the equipment. They were on the lookout for another notebook such as the boys had found in the cabin, but there was nothing of the kind in the box. When they were satisfied of this, Mr. Brandon carefully replaced everything as he had found it, and snapped the lock shut.