and, instead of possessing its rugged regularity of outline, had a curious, one-sided look.
"It seems to me," remarked Rob, who had been studying it for some moments, "that the centre of gravity in that fellow must be rather ticklish."
"It may be more stable than the big one," said Fred, "for you don't know what shape they have under water; a good deal must depend on that."
Jack Cosgrove, the sailor, who had joined the little party at the invitation of the captain, ventured to say:
"Sometimes them craft get top-heavy and take a flop; I shouldn't be s'prised if that one done the same."
"It must be a curious sight; I've often wondered how Jumbo, the great elephant, would have looked turning a somersault. An iceberg performing a handspring would be something of the same order, but a hundred thousand times more extensive. I would give a good deal if one of those bergs should take it into his head to fling a handspring, but I don't suppose – "
"Look!" broke in Fred, in sudden excitement.
To the unbounded amazement of captain, crew, and all the spectators, the very thing spoken of by Rob Carrol took place. The vast bulk of towering ice was seen to plunge downward with a motion, slow at first, but rapidly increasing until it dived beneath the waves like some enormous mass of matter cast off by a planet in its flight through space. As it disappeared, two-fold as much bulk came to view, there was a swirl of water, which was flung high in fountains, and the waves formed by the commotion, as they swept across the intervening space, caused the "Nautilus" to rock like a cradle.
The splash could have been heard miles away, and the iceberg seemed to shiver and shake itself, as though it were some flurried monster of the deep, before it could regain its full equilibrium. Then, as the spectators looked, behold! where was one of those mountains of ice they saw what seemed to be another, for its shape, contour, projections, and depressions were so different that no resemblance could be traced.
"She's all right now," remarked Jack Cosgrove, whose emotions were less stirred than those of any one else; "she's good for two or three thousand miles' voyage, onless she should happen to run aground in shoal water."
"What then would take place, Jack?" asked Fred.
"Wal, there would be the mischief to pay gener'ly. Things would go ripping, tearing, and smashing, and the way that berg would behave would be shameful. If anybody was within reach he'd get hurt."
Rob stepped up to the sailor as if a sudden thought had come to him. Laying his hand on his arm, he said, in an undertone:
"I wonder if the captain won't let us visit that iceberg?"
CHAPTER III
AN ALARMING SITUATION
The boldness of the proposition fairly took away the breath of the honest sailor. He stared at Rob as though doubting whether he had heard aright. He looked at the smiling youth from head to foot, and stared a full minute before he spoke.
"By the horned spoon, you're crazy, younker!"
"What is there so crazy about such an idea?" asked Fred, as eager to go on the excursion as his friend.
Jack removed his tarpaulin and scratched his head in perplexity. He voided a mouthful of tobacco spittle over the taffrail, heaved a prodigious sigh, and then muttered, as if to himself:
"It's crazy clean through, from top to bottom, sideways, cat-a-cornered, and every way; but if the captain says 'yes' I'll take you."
Rob stepped to where the skipper stood, some paces away, and said:
"Captain McAlpine, being as this is the first time Fred and I ever had a good look at an iceberg, we would be much obliged if you will allow Jack to row us out to it. We want to get a better view of it than we can from the deck of the ship. Jack is willing, and we will be much obliged for your permission."
Fred was listening breathlessly for the reply, which, like Rob, he expected would be a curt refusal. Great, therefore, was the surprise of the two when the good-natured commander said:
"The request doesn't strike me as very sensible, but, if your hearts are set on it, I don't see any objection. Yes, Jack has my permission to take you to that mass of ice, provided you don't stay too long."
"He's crazy, too!" was the whispered exclamation of the sailor, who, nevertheless, was pleased to gratify his young friends.
The preparations were quickly made. Fred had heard that polar bears are occasionally found on the icebergs which float southward from the Arctic regions, and he insisted that they ought to take their rifles and ammunition along. Rob laughed, but fortunately he followed his advice, and thus it happened that the couple were as well supplied in that respect as if starting out on a week's hunt in the interior of the country.
When Jack was urged to do the same he resolutely shook his head, and then turned about and accepted a weapon from the captain, who seemed in the mood for humoring every whim of the youths that afternoon.
"Take it along, Jack," he said; "there may be some tigers, leopards, boa-constrictors, and hyenas prowling about on the ice. They may be on skates, and there is nothing like being prepared for whatever comes. Good luck to you!"
Rob placed himself in the bow of the small boat, and Fred in the stern, while the sailor, sitting down near the middle, grasped the oars and rowed with that long, steady stroke which showed his mastery of the art. There was little wind stirring, and the waves were so slight that they were easily ridden. The sea was of a deep green color, and when the spray occasionally dashed over the lads it was as cold as ice itself. By this time the iceberg had drifted somewhat to the southward, but its progress was so slow as to suggest that the two currents which swept against it were nearly of the same strength. Had it been earlier in the day it would probably have remained visible to the "Nautilus" until sunset.
Meanwhile, a fourth mass rose to sight in the rim of the eastern horizon, so that there seemed some truth in Rob's suggestion that they had run into a school of them. They felt no interest, however, in any except the particular specimen before them.
How it grew upon them as they neared it! It seemed to spread right and left, and to tower upward toward the sky, until even the reckless Rob was hushed into awed silence and sat staring aloft, with feelings beyond expression. It was much the same with Fred, who, sitting at the stern, almost held his breath, while the overwhelming grandeur hushed the words trembling on his lip.
The mass of ice was hundreds of feet in width and length, while the highest portion must have been, at the least, three hundred feet above the surface of the sea. What, therefore, was the bulk below. Its colossal proportions were beyond imagination.
The part within their field of vision was too irregular and shapeless to admit of clear description. If the reader can picture a mass of rock and débris blown from the side of a mountain, multiplied a million times, he may form some idea of it.
The highest portion was on the opposite side. About half-way from the sea, facing the little party, was a plateau broad enough to allow a company of soldiers to camp upon it. To the left of this the ice showed considerable snow in its composition, while, in other places, it was as clear as crystal itself. In still other portions it was dark or almost steel blue, probably due to some peculiar refraction of light. There were no rippling streams of water along and over its side, for the weather was too cold for the thawing which would be plentiful when it struck a warmer latitude.
But there were caverns, projections, some
