hen, after
having pulled and cut their way through for fifty yards more, they
came to a spot that was rocky and covered with a tangle of thorny
bushes.

"Wow!" ejaculated Tom, after scratching his hand and his leg. "This is
something prime, I must confess!"

"What I call hunting a treasure with a vengeance," added Dick, dryly.

"I move we go back," came from Sam. "We seem to be stuck in more ways
than one."

"Perhaps it is better traveling just beyond," declared Dick. "I am not
going to turn back just yet anyway."

He took the lead, breaking down the thorny bushes as best he could,
and Sam and Tom followed closely in his footsteps. It was rather dark
among the bushes and almost before the three knew it they had fallen
headlong into a hollow.

"Well, I never!"

"This is coming down in a hurry!"

"Is this the treasure cave?"

Such were the exclamations of the three lads as they picked themselves
up out of the dirt, which, fortunately for them, was soft and
yielding. Nobody had been hurt, for which they were thankful.

The hollow was about fifty feet in diameter and half that depth in the
center. On the opposite side were more bushes and rocks, and then a
thicket of tall trees of a variety that was strange to them.

"This is what I call hard work," observed Tom, as they began to fight
their way along again. "I don't know but what we would have done as
well to have waited until morning."

"Don't croak, Tom," said Sam.

"Oh, I am not croaking, but this is no fun, let me tell you that."

All of the boys were panting from their exertions, and soon they had
to call a halt to get their breath. It was now growing dark rapidly,
for in the tropics there is little of what we know as twilight.

"We certainly can't do much more in this darkness," said Dick at last.
"I must confess I thought walking in the direction of the cave would
be an easy matter."

"Well, what's to do next?" questioned Sam, gazing around in
perplexity.

This was no easy question to answer. As if by magic darkness had
settled all around them, shutting out the sight of objects less than a
hundred yards away. To go forward was all but impossible, and whether
or not they could get back to where they had come from was a serious
problem.

"If we can't get back we'll have to camp right here," said Dick.

But they did not want to stay in such a thicket and so they pushed on
a little further, until they reached a slight rise of ground. Then
Dick