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 into the hut and rekindled the fire. The stove was soon roaring, and it was not many minutes before the savoury odour of broiled bear-steaks roused Bell from his torpor.

What a feast this meal was to the poor starving men may be imagined. The Doctor, however, counselled 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."

"I hope we'll find something there to make a fire with," said the Doctor, smiling. "My lens does well enough at present; but it needs the sun, and there are plenty of days when he does not make his appearance here, within less than four degrees of the pole."

"Less than four degrees!" repeated Altamont, with a sigh; "yes, my ship went further than any other has ever ventured."

"It is time we started," said Hatteras, abruptly.

"Yes," replied the Doctor, glancing uneasily at the two captains.

The dogs were speedily harnessed to the sledge, and the march resumed. [Illustration: ]