"We want a lens; well, let us make one."
"How?" asked Johnson.
"With a piece of ice."
"What? Do you think that would do?"
"Why not? All that is needed is to collect the sun's rays into one common focus, and ice will serve that purpose as well as the finest crystal."
"Is it possible?" said Johnson.
"Yes, only I should like fresh-water ice, it is harder and more transparent than the other."
"There it is to your hand, if I am not much mistaken," said Johnson, pointing to a hummock close by. "I fancy that is fresh water, from the dark look of it, and the green tinge."
“You are right. Bring your hatchet, Johnson."
A good-sized piece was soon cut off, about a foot in diameter, and the Doctor set to work. He began by chopping it into rough shape with the hatchet; then he operated upon it more carefully with his knife, making as smooth a surface as possible, and finished the polishing process with his fingers, rubbing away until he had obtained as transparent a lens as if it had been made of magnificent crystal.
The sun was shining brilliantly enough for the Doctor's experiment. The tinder was fetched, and held beneath the lens so as to catch the rays in full power. In a few seconds it took fire, to Johnson's rapturous delight.
He danced about like an idiot, almost beside himself with joy, and shouted, "Hurrah! hurrah!" while Clawbonny hurried back to the hut and rekindled the fire. The stove was soon roaring, and it was not many minutes before the savory odor of broiled bear-steak roused Bell from his torpor.
What a feast this meal was to the poor starving men may be imagined. The Doctor, however, counseled moderation in eating, and set the example himself.
"This is a glad day for us," he said, "and we have no fear of wanting food all the rest of our journey. Still we must not forget we have further to go yet, and I think the sooner we start the better."
“We cannot be far off now," said Altamont, who could almost articulate perfectly again; "we must be within forty- eight hours' march of the Porpoise."
