"I'd feel safer if I knew that beast was dead," said the captain. "He may take it into his head to attack us again."

"And he may be only one of a regular tribe," put in Dave.

"No, Dave; gorillas don't live together like monkeys. At the most you'll find two together."

With great caution they climbed to the top of the rocks and peered over. Not a living creature of any sort was in sight.

"He has gone, that's certain," said Dave, and gave a sigh of relief.

They went on their way, and inside of an hour had walked completely around the island, which was not over half a mile in diameter.

"Now we'll go up the hill and take a look around," said Captain Broadbeam.

On the side of the hill the tropical growth was thick, and they had to fairly cut their way through the tangle of underbrush and long trailing vines.

"This is what I call work," said Dave, panting. "How much further have we to go?"

"Not very much further, Dave. I think—listen!" The captain broke off short and both listened. But only the murmur of the breeze through the trees came to their ears.