chum might be alarmed at this sudden and surprising awakening and make some sound.
"Who is it?" whispered the other.
"It's me—Frank. I've come to help you get free."
From the darkness he heard a gasp of surprise, but it was quickly silenced.
"I'll waken Biff," replied Chet. Frank had merely guessed at this being Chet Morton whom he had awakened, and found that his guess had been correct.
In a few minutes Biff had been aroused.
"The men are asleep," whispered Frank. "Don't ask questions. Keep quiet until we get outside. I have the keys. Where is the lock?"
"We're chained to the rock," Chet whispered in return. He grasped Frank's hand, guiding it to the wall of the cave until his fingers closed on a heavy padlock. "There you are!"
Frank tried several keys before he found the one that fitted, but at length the padlock snapped open. He grasped the chain with his other hand so that it did not fall to the floor with a clatter. He lowered it gently.
"Now for the handcuffs."
Chet extended his wrists and Frank finally located the small key that opened the handcuffs. He removed them, then released Chet's
