Both listened, and presently from the other side of the rocks came a low whine, followed by a scream.
"Somebody is there!" murmured Dave. "Perhaps a savage!"
"We'll take a peep," began Captain Broadbeam, when of a sudden a hairy form leaped on top of the rocks and confronted them.
The form was that of a gorilla. The creature was all of four feet high, with strong limbs and a face of peculiar ferocity.
"Look out!" yelled Dave. "He means mischief!"
The young diver was right. The gorilla gave a snarl, and the next instant made a leap for Captain Broadbeam's shoulder. It landed fairly and squarely on the captain and bore that individual to the ground.
CHAPTER XIX
FIGHTING A GORILLA
The appearance of the gorilla had been so unexpected that for the instant Dave knew not what to do. As the captain went down with the creature on top of him, the young diver fancied that the man would surely be killed.
"Help!" cried Captain Broadbeam, and this call aroused the youth to his senses. Catching up a stick, he hit the gorilla a resounding whack on the head. Then he struck at the beast's body.