"Where is Fred?" suddenly ejaculated Bart.
"Fred?"
"Yes. I can't see him anywhere."
"He must be somewhere." Joe lost interest in the race at once. "Fred, where are you?" he called out.
No answer came back and now Bart also shouted. Both boys gazed at each other in unexpected terror.
"There he is!"
"Help!" came faintly from the stout youth. His head had bobbed up for only an instant, and now he sank beneath the surface of the lake again.
"He has a cramp, that's what's the matter!" came from Joe. "Bart, we'll have to get him out!"
"To be sure!"
Both lost no time in swimming to where they had last seen the stout youth.