"
"You don't say? That would mean some hustling then to get up out of
reach, Frank."
"I reckon it would. Look out for that nasty rock; it nearly tripped
me, Bob."
"What was that flash, Frank? Don't tell me it was lightning, real
lightning, and that the long delayed storm is going to break right now,
when it's got us cooped up in this hole?"
"It was lightning, all right. There, that proves it!"
Frank's words were drowned in a crash of genuine thunder that made the
foundations of the mountain shake just as much as the mad efforts of
the imprisoned geyser had ever done.
"No mistake about that sort of thing," cried Bob, as he stumbled along
after his chum. "There it comes again, Frank. I guess I'd better be
picking out a good way up the wall somewhere, for it looks like we'd
have to climb!"
Frank was doubtless sizing up the situation in his mind. He was also
listening for some sound which he expected to hear, but which was going
to prove a very unwelcome one.
"No use going any further, Bob, if so be you've seen anything that
looks promising here," he declared, when the reverberations of the
thunder had ceased to echo through the canyon.
"Then you think we're going to get caught here, Frank?" questioned the
other.
"I'm afraid to take the chances of keeping on any further. It may be a
long run to the next broken wall, that offers us a chance to climb.
Some places the sides go up as smooth as glass.
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