A rain of bullets thudded against the sand heaps as the defenders dropped behind them and fired over the tops. The darkness was pierced with streaks of spurting fire as rifle spoke to rifle. It was evident that the enemy were shooting to kill, and the defenders did the same. Wherever a rifle flash lit up the darkness they aimed at the place and quickly fired. Occasional cries and oaths told them that some of their bullets were finding their mark. But they were not to go unhurt for their part. Charley, who had raised himself up to fire, felt the thud of a bullet and his left arm dropped helplessly by his side. In the excitement he felt no pain, but, letting go his rifle, he drew his automatic and blazed away with it. Walter, behind the next pile, had his straw hat shot off his head. Bob Bratton pitched forward on his face and lay still and motionless, while one of the Spaniards sank to the ground, his hand clapped to a wounded leg and cursed fluently. Once Walter glanced back at the machine. Its platform was revolving rapidly and the rifles of its crew were spatting viciously. But the enemy did not now have the protection of the trees, and they could not long face the hail of lead being poured upon them. Their firing suddenly ceased. From where they had stood came piercing shrieks, and following the shrieks came frightened yells and the thud of running feet.

"Captain, take most of the men and go to the aid of the machine," Charley commanded. "The fighting is over here." The old sailor hurried away, followed by McCarty and most of the Spaniards.

From the darkness ahead of the two boys still came the awful shrieks.

"Chris, get a lantern, we must find out what's the matter out there," Charley said.

The little negro was back in a minute with the light and, taking it from him, Walter led the way hastily toward the shrieks which were growing fainter. He was closely followed by his chum and Chris with their automatics in their hands. As the lantern lit up the scene of the shrieks, Walter shrank back with a cry of fear and horror. A hideous head with lidless gleaming eyes was reared many feet above the ground. Recovering himself with an effort, the lad raised his automatic and fired directly between the gleaming eyes. At the same minute Charley and Chris discharged their weapons and the hideous head fell to the ground.

Holding aloft the light, the three frightened boys advanced cautiously. Its rays shone down on a sickening sight. On the ground lay one of the gunmen crushed into a shapeless mass, while, still partly coiled around the man's body, a great boa constrictor writhed in its last death struggles.

"Ugh!" shuddered Walter, "I did not know there was such an awful thing in Florida."

"Fire drove it out of the jungle, I guess," said Charley jerkingly. "Let's get back to camp. Bratton has fallen and one of the Spaniards is badly hurt. We can do nothing here, it's all over."

They had carried Bratton in and laid him upon his cot and were helping the wounded Spaniard in, when Walter cried:

"Look at the machine! Look at the machine!"