er my experience with lumbermen's appetites, I realize that you must
have been on your mettle all the way."

"It was rather hard at the end," admitted Jimmy, "but take it all
together it was a real pleasure. That cook sure does know how to make
good pies," and an expression of blissful reminiscence spread over his
round countenance.

"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