I recognized the voices as those of Ker Karraje and Engineer Serko.
The two men stopped close to where I was lying, and continued their
conversation in English--which is the language generally used in Back
Cup. I was therefore able to understand all that they said.
They were talking about Thomas Roch, or rather his fulgurator.
"In a week's time," said Ker Karraje, "I shall put to sea in the
_Ebba_, and fetch the sections of the engines that are being cast in
that Virginian foundry."
"And when they are here," observed Engineer Serko, "I will piece them
together and fix up the frames for firing them. But beforehand, there
is a job to be done which it seems to me is indispensable."
"What is that?"
"To cut a tunnel through the wall of the cavern."
"Through the wall of the cavern?"
"Oh! nothing but a narrow passage through which only one man at a time
could squeeze, a hole easy enough to block, and the outside end of
which would be hidden among the rocks."
"Of what use could it be to us, Serko?"
"I have often thought about the utility of having some other way of
getting out besides the submarine tunnel. We never know what the
future may have in store for us."
"But the walls are so thick and hard," objected Ker Karraje.
"Oh, with a few grains of Roch's explosive I undertake to reduce the
rock to such fine powder that we shall be able to blow it away with
our breath," Serko replied.
It can easily be imagined with what interest and eagerness I listened
to this.
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