"Of course this is all guess work, Hiram," said Dave, after a moment's thought. "Just the same, it fits in to your theory."
"Say," spoke Hiram suddenly, "I've an idea."
"What is it, Hiram?"
"Make a stop just as soon as you can."
"What's that for?"
"Let me out, and give me a chance to find out who that signal was intended for."
"I declare, it's not a bad plan," said Dave at once.
"Can't you find some safe place where we can land?"
"There won't be much trouble about that."
"Do it, Dave," urged Hiram, "and right away, so I won't lose track of the place yonder."