It meant that at any moment they might drift helplessly into some mighty berg and be crushed like an egg-shell on its icy sides. Captain Barrington muffled up in polar clothes and oilskins, rushed past the boys like a ghost and ran forward shouting some order. The first and second officers followed him.

Presently the voice of the rapid-fire gun was heard, and the boys could see its sharp needles of white fire splitting the black night.

A blue glare far away answered the explosions. It was the Brutus signaling her consort. But that was all she could do. In the terrific sea that was running it would have been impossible to rig a fresh cable. The only thing for the two ships to do was to keep burning flare lights, in order that they might keep apart and not crash together in the tempest.

"Shall we go down, do you think?" asked Billy, shivering in spite of himself, as a huge wave towered above them as if it would engulf the polar ship, and then as she rose gallantly to its threatening bulk, went careening away to leeward as if angry at being cheated of its prey.

"We can only hope for the best," said a voice at his elbow. It was Captain Hazzard. "I have implicit confidence in Captain Barrington. He is a sailor of rare mettle."

These remarks were shouted at the top of the two speakers' voices, but they sounded, in the midst of the turbulent uproar that raged about them, like the merest whispers.

Time and again it seemed that one of the great waves that came sweeping out of the darkness must engulf them, but so far the Southern Cross rode them like a race-horse, rising pluckily to them as they rushed at her. Captain Barrington and his officers were trying to get some headsail put on the vessel to keep her head up to the huge waves, but they were unwilling to imperil any one's life by ordering him out on the plunging bowsprit, that was now reared heavenward and again plunged downward as if pointing to the bottom of the sea.

Ben Stubbs it was who finally volunteered to crawl out, and two other American seamen followed him. They succeeded, although in deadly peril half a dozen times, in getting the jib gaskets cast loose, and then crawled back half frozen to receive the warm plaudits of the officers and more substantial rewards later on. With her jib hoisted, the Southern Cross made better weather of it, but the seas were fast becoming more mountainous and threatening. The wind screeched through the rigging like a legion of demons. To add to the turmoil some casks got loose and went rolling and crashing about till they finally went overboard as a great wave toppled aboard.

"We must see how the professor is getting on," said, or rather yelled,
Frank suddenly.

He and the boys entered the cabin structure aft, which seemed warm and cosy with its light and warmth after the turmoil of the terrific battle of the elements outside.