Jack sighed and opened his eyes.

"Let's get him on board the yacht at once," exclaimed the captain.

First, however, he pa.s.sed his hand along each limb, and then felt Jack's ribs.

The patient winced at the last experiment and uttered a low cry.

"Legs and arms all right," muttered the captain, as he with our hero's help carried the boy to the small boat; "so, if a rib's broken, he must consider himself well out of a bad sc.r.a.pe."

Bob again pulled his hardest, and when alongside the yacht his comrade with some difficulty was got on board.

It was not until late that evening that Jack was able to tell of his wonderful escape.

"I don't know much about it," he said, "but never shall I forget the awful feeling as I shot over the edge of the precipice.

"Of course I thought that I should fall down a well that penetrated right through the berg into the sea.

"However, instead of that, I did not fall a great distance before I came down feet first among a lot of pieces of loose ice, or, if not loose, they gave way with me, and together we went clattering down a second slope.

"All of a sudden I was pulled up by my rifle, which was slung round my shoulders, getting jammed across the pa.s.sage.

"I tried to gain my feet, but failed; the slope was too smooth and steep.

"There was but one thing for it, and that was to go on.

"I slipped the sling over my head, and away I went again.

"Then came another fall.

"This nearly knocked me senseless.

"I just remember another slide, then daylight, then a last fall, and I lost all consciousness, only coming to myself to find you leaning over me."

"How is your side?" asked the captain. "Your escape was most wonderful.

Another foot farther, and you would have been drowned."

"It was, as you say, a narrow escape. As for my side, I must say it's rather painful."

However, on the captain pressing it, he came to the conclusion that no ribs were broken.

It was bandaged up, and Jack was able to walk about, thankful that things were not worse.

Chapter IX.--The Volcano Of Ice.

For three long days the _Dart_ bore away northwest, the direction in which the last had been seen of the missing boat.

"Luckily it's the right course to steer for the Siberian coast,"

remarked the captain, as he sat over his wine after midday dinner. "We shall sight the high land to-morrow morning, if not before"

"Surely we shall come across the boat in time, captain?" remarked Bob.

"Well, we have had wonderfully fine weather," replied the captain. "But, after all she was but a cutter, handled by a lunatic."

And he and Bob interchanged looks of despair as they ascended the companion ladder.

"Bok, go to the foremast-head," ordered the captain. "Take the gla.s.s, and have a look around."

The sailor slung the telescope over his shoulder and nimbly mounted the rigging.

When he arrived at the topgallant-yard he pa.s.sed his arm round the skypole, and, adjusting the gla.s.s, swept the line of the horizon.

There was a long pause.

"Deck ahoy!"

"What is it?" bellowed the captain.

"Sure, there is a mist, or smoke right ahead, and above it I see what looks like the top of a mountain," replied the Irishman.

"Nothing else?"

"There is a low, flat berg."

"Nothing more? No sign of a boat-sail?"

"Nothing the size of a pocket handkerchief, yer honor."

"Well, we must give up the search for the present and start for the Siberian sh.o.r.e. But I give you my word, Bob, I shall not give up this hunt for many a week."

The wind fell light, and the _Dart_ did not make more than three knots an hour during that afternoon.

The strange misty appearance still hung over the water.

They were gradually approaching it, and it was not more than a couple of miles ahead, when, as the sun set, the captain and the two boys went to supper, leaving Leeks in charge of the deck.

They had just finished their meal when the latter shouted down the companion for them to come up.

An extraordinary scene met their gaze when they reached the deck.

The yacht was still in moderately smooth water, but a quarter of a mile before her the sea was covered with a thick mist, while it was tossed hither and thither in tumbling waves, which met and crossed one another in wild confusion.

As they looked a thick body of smoke was belched from the midst of the turmoil.

"Port! hard aport!" shouted the captain. "Round with the yards! Flatten in the jib! Be smart, there!"