"Come on out, Joe!" she called. Joe could not hear her, of course. He waved his hand to her. He could not stay under much longer, he felt sure, but he did not want to give up. It was not until three seconds of the third minute had passed that he found it impossible to hold his breath longer, and up he shot, filling his lungs with air as he reached the surface.
At that moment Benny Turton came into the tent, and saw some one in his tank.
"What happened?" he cried, running forward. "Did some one fall in?"
"It's all right," Helen informed the "human fish."
CHAPTER XI
HELEN'S DISCOVERY
Joe Strong climbed out of the tank. He grinned cheerfully at Benny.
"It was so hot I took a bath in your tub," he explained. "It sure was fine! Hope you don't mind?"
"Not a bit," returned Benny, cheerfully. "Come in any time you like. It isn't exactly a summer resort beach, but it's the best we have."