Mr. Jenks and Tom cast one longing look behind at the
complicated and expensive machinery that had been installed in
the cave by the diamond makers. They had abandoned it, and in it
lay the secret of making precious gems. But there was no time to
stop now, and investigate.
"This way," urged Bill Renshaw. "We'll soon be out."
"But won't it be dangerous to go outside?" asked Mr. Damon.
"Shan't we be struck by lightning? There is some protection in
here."
"None at all," said Mr. Parker, quickly. "This mountain is a
natural lightning rod. To stay here in this cave will be sure
death when the storm gets directly over it. And that will be very
soon. We must get on insulated ground. Is there any part of this
mountain that does not contain iron ore?" the scientist asked of
the former spirit.
"Yes; the way out by which we are going lands on a dirt hill."
"That's good; then we may be saved."
On they ran. They had no lanterns, but the blue light of the
electricity, as it leaped from point to point inside the cave,
where there were outcroppings of iron ore, made the place bright
enough to see.
"Here we are!" cried Bill Renshaw at length. "Here's the way
out!"
Making a sudden turn in the winding passage he showed the
adventurers a small opening in the side of the crag.
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