It was perilous work, but they did not falter.
At length they reached the level summit and glanced down.
The yacht looked beautiful as she lay to, with her topsails backed, and every movement of the figures on deck could be distinctly seen.
Crossing some rough, porous ice, they came to the pinnacle.
This was rougher than it had looked from below, and they found not much difficulty in mounting.
Soon they reached the summit, or, rather, within a few yards of it, where there was a tolerably safe and level spot.
With anxious speed, Bob extended the telescope, which he had carried slung over his shoulder.
For some time he swept the ocean in vain, but at length, far to the westward, just on the edge of the horizon, he caught sight of a white speck, which could be nothing but a sail.
"Look, Jack, and tell me what you think!" he exclaimed.
"I can see it!" cried the latter, after a lengthened search. "I agree with you—it must be a boat-sail; anyway, it's too distant to be a bird's wing. It must be many miles off."