"I see," reflected the professor.
"Then you'll let me out?"
"I am afraid I can't do that."
"Then lean over here and I'll tell you a secret that'll make you change your mind."
The professor leaned closer. The man's hands, free from the wrists, were moving cautiously. All at once Professor Zepplin's revolver was snipped from its holster and a bullet tore through his clothes, taking some of the professor's skin with it. The professor fell back, staggering to one side out of range where he sank down to the ground holding a hand to his side.
CHAPTER VII
RECEIVING A LATE VISITOR
So unexpected had been the shot that, for a few seconds, the boys stood dumbfounded.
"I'm shot! I'm shot!" yelled the professor.
Bang!