"I don't," answered Betty, promptly. "The less we know the less we can tell if any men question us. Now let's get aboard and get back. No more manatees for me!"
The Gem was none the worse for her queer tow, and soon, with the girls aboard, was dropping down stream again. The strange youth was not in sight, even when the turn of the river was made, but he may have poled off into one of the many little bayous, or tributary streams, that joined the main one.
"I'm glad he's out of sight," murmured Grace. "If those men should come after him"
She stopped suddenly, and stared ahead. There, coming around a turn in the river, was a small motor boat containing two men, who, at the sight of the Gem, headed directly for her, at the same time indicating by gestures that they wished to speak to those aboard.
