"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.
CHAPTER VIII.
CAUGHT IN THE FLAMES.
"Nonsense," said Frank, sharply, although he had been considerably startled by the inexplicable occurrence himself, "you know there are no such things as ghosts, Ben."
"And if there were they wouldn't throw cocoanut shells at us," went on
Harry.
"Wall," said Ben, stubbornly, "what else could it have been?"
"A wild man," suggested Billy; "perhaps a whole tribe of them."