hand of Frank Haywood; and this pressure was the signal understood among them.
“Look up ahead!” was whispered in Bob’s ear; and as he turned his eyes obediently upward, he discovered what he took to be a giant firefly glowing in the darkness of the mountainside—it would vanish, only to again appear, like a small star!
CHAPTER VIII
“THE WAY IS CLEAR!”
“What is it, Frank?” whispered Bob, as he stared in wonder at the strange firefly that seemed to appear, and then vanish so regularly.
“A sentry smoking a cigarette,” came the reply.
“How silly of me not to have guessed that,” thought the Kentucky boy.
And then he sniffed the air, for it chanced that the night wind was blowing gently from the point where that fire glowed.
“Smoke, sure enough, and from a cigarette, just as Frank said,” he continued to himself.
Of course it was very plain now why the expedition had come to such a sudden halt. Here was a vidette posted in a position where he could discover any suspicious movement below. There was a wide strip of moonlight confronting them, and it would be difficult to pass along the trail without crossing this, when of course the keen eyes above would discover their presence.
“What are we going to do about it, Frank?” he managed to say in his chum’s ear.