"I'm not moving!" retorted Paul.
"But the boat is going—and up stream!" cried Alice.
"Oh, Paul!" exclaimed Ruth. "What has happened?"
At the same moment the craft careened violently, and a bulky object rose partly from the water in front of it.
"An alligator has attacked us!" screamed Alice.
CHAPTER XVII
OUT OF A TREE
Paul sprang to his feet with such suddenness that he nearly upset the boat, and the girls shrieked in even greater fright.
"Sit down! Oh, sit down!" Alice begged him.