"Shot number one!" cried Andy, who was setting off the rockets.
For a few seconds after the first flight there came no sound from the natives at the ship. Then, just as the second rocket was set off there issued a long-drawn howl, which was succeeded by cries of fear.
"We've waked 'em up!" shouted Jack.
In rapid succession several more rockets were sent over the Porpoise. By the light of them could be seen a mass of natives crowded out on the small deck, while others were in their canoes.
"I think I'll try it a little lower this time," remarked Andy. "Maybe I can hit some of 'em!"
He slanted the support closer to the ground and set off two rockets at once. Straight across the sandy beach they flew, directly toward the crowd of natives on the ship. Right into the midst of the savages the trailing comet of fire shot, with a hiss, roar and sputter that was enough to strike terror into the bravest heart.
There was a long piercing howl of fear. Then, as the natives felt the hot sparks scatter over their half-naked bodies, they broke into a wild stampede. Over the side of the ship they plunged, into the sea, and swam off. Those in boats paddled quickly away.
For good measure Andy sent another rocket into the midst of the fleeing ones, and this served to quicken their departure. By the light of the last one it could be seen that the ship was deserted, though the water all about her was black with the swimming savages, and the canoes.
"I guess they won't come back in a hurry!" cried Andy. "Come on! We'll board the ship now, and get the electric guns to ward off any further attacks!"
"That's the talk!" cried Mark.