and the jerking and straining upon the thongs showed that it was capable of considerable lift. Challenger, like a glad father in the presence of his first-born, stood smiling and stroking his beard, in silent, self-satisfied content as he gazed at the creation of his brain. It was Summerlee who first broke the silence.
"You don't mean us to go up in that thing, Challenger?" said he, in an acid voice.
"I mean, my dear Summerlee, to give you such a demonstration of its powers that after seeing it you will, I am sure, have no hesitation in trusting yourself to it."
"You can put it right out of your head now, at once," said Summerlee with decision, "nothing on earth would induce me to commit such a folly. Lord John, I trust that you will not countenance such madness?"
"Dooced ingenious, I call it," said our peer. "I'd like to see how it works."
"So you shall," said Challenger. "For some days I have exerted my whole brain force upon the problem of how we shall descend from these cliffs. We have satisfied ourselves that we cannot climb down and that there is no tunnel. We are also unable to construct any kind of bridge which may take us back to the pinnacle from which we came. How then shall I find a means to convey us? Some little time ago I had remarked to our young friend here that free hydrogen was evolved
