s always goin' to give you the inside of
the peaches and the outside of the owanges!' And that's about your idea
of generosity, Nellie," laughed Bobby.

Mrs. Case arrived just then and they took the steamer across to the
amusement park. But they did not linger. There was a good path through
the "woodsy" part of the island, and the party set out on this way
almost immediately. There were some open fields on Cavern Island as well
as woods, and the superintendent of the park cultivated a little farm.

As the party skirted the ploughed fields some crows, doing all the
damage they could among the tender corn sprouts, rose and swept lazily
across the vista to the woods, with raucous cawings.

"Oh, Mrs. Case!" cried Bobby.

"What now, Clara?" was the teacher's response.

"You know something about birds, don't you?"

"A little," replied Mrs. Case, cautiously, although the girls knew that
she was really much interested in bird-lore.

"Then tell me something I've long wanted to know," cried Bobby, her eyes
dancing.

"And what is that?"

"What really is the cause of the crow's caws?"

"A bone in his throat, I expect, my dear," replied the teacher, amid the
laughter of the other girls. "But this is a botanical expedition, not
ornithological. What was your question about the anemone, Nellie?"

They passed the farm and mounted the hillside toward the upper plateau
above the caverns at Boulder Head. From this point they could see from
end to end of Luna Lake, and the greater part of the island itself. But
just below them, on the shore at the foot of the rugged cliff, it was
not so easy to see; and, when Laura Belding and Jess, walking with arms
around each other's waists, on the very verge of the cliff, heard a
sound which startled them below, they could not at first see what caused
it.

"It was a human voice!" gasped Jess.

"Somebody groaning," admitted Laura.

"I--I bet it is a ghost, after all," giggled Jess. "Otto Sitz won't want
to come here again if we tell him----"

"Hush!" commanded Laura. "There is somebody below--in trouble. Wait!
Cling to my belt, Jess--and to that sapling with your other hand. Now,
don't let me fall."

"Go ahead," said Jess, between her teeth, as Laura swung her body out
over the brink of the hundred-foot drop. "I can hold you."

"I can see him!" gasped Laura, after a moment. "It is somebody lying on
a narrow shelf half way down the cliff. It's a boy--yes! I see his
face----

"Billy