“A gold mine?” inquired Ned, with a laugh.

“Part of a clothing store,” replied Frank. “Look!” and he pointed to where, behind a clump of trees, was a large pile of men’s clothing, hats, shoes, coats, vests, trousers and shirts.

“That solves the mystery!” exclaimed Fenn.

“How?” asked Bart.

“Why there’s been a big robbery! The men have hidden their booty in the woods, until they have a chance to carry it away. Those two men we just saw are members of the gang. They’re keeping a look-out until their boat comes and then they’ll take the stuff away. Yes, that’s it!”

“I believe Fenn’s right,” declared Ned.

“Do you?” asked Frank quietly. “Then how do you account for the fact that all the garments are old? There’s not a new one among ’em, not even the shoes. You can see for yourself.”

The boys looked more closely at the garments, which were arranged in piles, with canvas coverings tossed to one side, as though they had been protected from the weather, and recently opened. They did not touch the things, but it did not need a close inspection to show that Frank was right. The garments were all old ones.

“If there was a robbery it must have been of a second-hand store,” went on Frank, “and that’s not likely. Besides, see here,” and he pointed a little farther off, where a heap of Chinese clothing lay on the ground.

“Well, if this doesn’t beat the Dutch!” exclaimed Bart. “What do you make out of that?”