to camp. The first thing that all wanted was a drink of water. They
made for the place in which the drinking fluid had been left.

As soon as his eyes fell on the row of improvised water pots Frank
gave an exclamation of dismay.

"Look here," he shouted, "there's some one on this island besides
ourselves."

"What!" was the amazed chorus.

"There must be," went on the lad, "see here, there were twenty
cocoanut shells of water when we went away, and now there are only
fifteen."

"Five gone!" exclaimed Ben in an alarmed voice, "and the spring has
already dried up."

"Hullo! What's that?" suddenly cried Billy, as something came crashing
through the branches.

The next moment one of the missing shells was rolled with great
violence into the middle of the group of adventurers. Before they had
recovered from their astonishment a strange sharp scream filled the
forest. There was a derisive note in its tones.

A strange fear filled the boys' hearts. Their faces paled.

"The island is haunted!" shouted Ben.