In spite of strenuous precautions, the dreaded scurvy had broken out, and five men had already succumbed to its ravages. In addition, nearly all the Esquimaux dogs used for drawing the sleighs had died from some unaccountable reason, and the explorers were compelled to shelter in snow huts at a spot nearly forty-five miles inland from Desolation Inlet.

Already the crew had donned their Arctic clothing, for the temperature was falling rapidly as the vessel reached the high latitudes.

Drifting bergs, some several hundred feet in height, were constantly being met, proving the Norwegian whaler's statement that the ice was breaking up earlier than usual. There was no longer any night. During the whole twenty-four hours of each day the sun was visible, a pale, watery orb in a misty sky.

Just as Captain Stormleigh was congratulating himself upon having made a quick passage, the Polarity encountered a belt of fog. For forty-eight hours it was impossible to see more than a few yards ahead. Speed had to be reduced to five knots, not on account of the possibility of colliding with other vessels, but with obstructions that are without means of indicating their presence—the dreaded "growlers," or masses of ice showing only a few feet above the surface.

Icebergs, of course, constituted a danger, but their presence can generally be detected by a rapid fall of temperature, and frequently by the cracking and rending of the berg itself.

On the second day of the fog, Leslie and Guy had just gone on board after dinner when they heard the engine-room telegraph-bell ring. Quickly the engines were reversed, the two propellers throwing a cascade of white foam past the entire length of the ship.

For'ard, both the look-out men were shouting at the same moment, with the result that what they said was unintelligible to the officers on the bridge. Then, with a terrific crash, the foremast was shattered twenty feet below the truck, the broken spar with the crow's nest attached to it falling upon the deck, together with a large fragment of ice.

Hearing the crash, but unable to see what had happened owing to the fog, the two lads groped their way for'ard, until their progress was barred by the d�bris of the foremast.

Another grinding sound pierced the veil of mist. The Polarity, still forging ahead, in spite of the reversed engines, had run into an almost perpendicular wall of ice. Fortunately she carried but little way, otherwise the impact would have stove in her bows. As it was, the shock was sufficient to throw both lads to the deck.

Leslie realised that the ship was in collision, but he was still ignorant of the nature of the obstruction.