em. "Old Will here disappeared and we had to go on a
still hunt to find him."

"Yes, he still has that confounded cave in his head. I'd given the
thing up. Why worry about a thing you can't find?" Frank demanded.

"But we saw it," Will argued, relieving the girls of the basket. "And as
long as we saw it, it's got to be on this island somewhere--that's a
sure thing--and I'm going to find it."

"Well, I wish you luck," said Allen gloomily. "Blow a horn when you find
it--we all want to be in at the death."

"If you are going to be so lazy I'll keep it all to myself," Will
retorted. "That cave is somewhere on this island, and I intend to find
where if I have to stay for another six months."

"Hear! hear!" cheered Roy. "That's the way I like to hear a fellow
talk."

"Yes, you do," Will was beginning when Betty interrupted him.

"I'm on your side, Will," she said staunchly. "I'm not going to stop
looking for the cave until we have to go home. Why, just think of the
things we might find. There is probably loot in that place that is worth
a great big lot of money, and in some cases they might be things that
money couldn't replace. It's not a question of mere curiosity, it's a
duty we owe to society."

"Speech! speech!" Roy cried again. "We have some little orator in our
midst! But may I ask," he added, with exaggerated politeness, "how we
are to go about accomplishing this service to society?"

Betty's patience was at an end. "Ask something you can answer yourself!"
she said shortly, and Roy was silenced.

They deposited the basket at what seemed to them an ideal spot and were
about to examine the contents when a sharp cry from Mollie arrested
their attention.

"Look! look!" she cried. "I've found it! Girls--boys, come here! Quick."

There was no need of urging, for they fairly flew in the direction of
her voice. There she was down on her knees before an opening much lower
and narrower than the one they had discovered before, but nevertheless
unmistakably another entrance to the cave.

"I caught my foot in a twig," she explained, as they crowded around her,
wild with excitement, "and I almost fell into the cave." So, as in the
first place, the discovery had been made through an accident.

The cave seemed to have been formed in a rise of the ground--it could
hardly be termed a hill--and as the young people looked inside, its
black interior stretched as far as they could see.

"Who wants to go in first?" asked A