They had to stand still and cover their eyes with their hands.

When the dust subsided they again hurried forward.

At the edge of the ravine a fiercer gust than the first hurled up millions of icy particles.

They glittered like a cloud of diamond dust in the sun's rays.

Wishing to escape, both the lads dropped on to the lower ledge.

"It's worse here than ever," exclaimed Bob, holding his rifle in one hand and placing the other so as partly to protect his face. "Let's get into yonder cave."

They both ran toward it--that is, Jack ran, and Bob hobbled after.

The former had only just time to see that the floor of the cavern sank at a sharp angle, when he felt his feet fly from under him.

Our hero, arriving at the cave's mouth at the instant of his friend's fall, was horror-struck to see him slide on his side toward the edge of a dark abyss, over which the water trickled.

"Help, Bob!" cried Jack, in vain trying to regain his feet.

Our hero clearly saw the fearful danger of his comrade's position.

Jack's feet were already over the edge.

"I am gone! Help!" he gasped.

Then, with a stifled cry, he disappeared over verge of the abyss.

Chapter VIII.--A Remarkable Story.

"Jack! Jack!" shouted Bob.

A sound as of falling rocks or ice blocks reached his ears, but no answering voice.

The echoes of the falling ma.s.ses died away.

Bob was filled with dismay at the dreadful ending of his chum.

He had reached his gun to him, but Larmore had been unable to grasp it.

He shuddered as he thought of Jack's feelings as he felt himself shooting over the precipice.

There was nothing to do but to return.

He found, lame as he was, the path extremely difficult.

But at length he reached the yacht and told his story.

"It's dreadful," said Captain Sumner. "First my daughter and your mother, and now your friend, a young gentleman we all liked and I, for one, looked on as a comrade, for we fought side by side against that rascally crew of ours."

The captain was quite affected.

When the _Dart_ was once more going through the water in the direction in which Bob had seen what he took for a boat sail, he came to the side of our hero, who stood leaning on the after-bulwarks, gazing at the berg, whose southern point they were now pa.s.sing.

"He was a fine young fellow!" he exclaimed, "and would have made a good officer.

"But what are you looking at?"

"A seal, sir," said Bob. "Don't you see it, lying in the shade of that block of ice, on the ledge, lapped by the swell?"

"Seals don't lie in the shade--they bask in the sun. Give me the gla.s.s, Bob."

But our hero was already drawing it out to his focus.

No sooner did he get it pointed correctly than he uttered a cry of surprise.

"That's his body!" he exclaimed. "At all events, a man's body. How on earth did it come there?"

A small boat was still towing astern.

Bob, forgetful of his sprain, lowered himself into her, and grasped the oars, while the captain followed.

"Hold hard!" shouted the mate.

Our hero impatiently, though he never for a moment expected to find his friend alive, complied.

In two minutes Leeks reappeared and let down a flask into the boat.

Our hero dashed the oars into the water, and the small boat moved faster over the heaving face of the ocean than she had ever done before.

"Don't deceive yourself. If it is your friend, he can't be alive," said the captain, as they approached the body of the ledge.

"It is Jack!" he added, a couple of minutes later. "But how on earth did he come there?"

Another score of vigorous strokes brought the little boat alongside the berg.

Hardly waiting to fasten the painter, they rushed to the body.

It was lying on its back, and as Bob bent over it he noticed a faint tinge of color on the cheek.

"He's only stunned, I believe, after all," cried our hero.

The captain unscrewed the top of the flask and poured a mouthful of wine between the teeth of the senseless lad.

In a minute it took effect.