January 25th they began to descend the steep slopes, which was even more fatiguing; a false step, which it was by no means easy to avoid, might hurl them down into deep ravines where they would certainly have perished. Towards evening a violent tempest raged about the snowy summit; it was impossible to withstand the force of the hurricane; they had to lie down on the ground, but so low was the temperature that they ran a risk of being frozen to death at once.
Bell, with Hatteras's aid, built with much difficulty a snow-house, in which the poor men sought shelter; there they partook of a few fragments of pemmican and a little hot tea; only four gallons of alcohol were left; and they had to use this to allay their thirst, for snow cannot be absorbed if taken in its natural state; it has to be melted first. In the temperate zone, where the cold hardly ever sinks much below the freezing-point, it can do no harm; but beyond the Polar Circle it is different; it reaches so low a temperature that the bare hand can no more touch it than it can iron at a white heat, and this, although it is a very poor conductor of heat; so great is the difference of temperature between it and the stomach that its absorption produces real suffocation. The Esquimaux prefer severe thirst to quenching it with this snow, which does not replace water, and only augments the thirst instead of appeasing it. The only way the travellers could make use of it was by melting it over the spirit-lamp.
At three in the morning, when the tempest was at its height, the doctor took his turn at the watch; he was lying in a corner of the hut when a groan of distress from Simpson attracted his attention; he arose to see to him, but in rising he hit his head sharply against the icy roof; without paying any attention to that, he bent over Simpson and began to rub his swollen, discolored legs; after doing this for a quarter of an hour he started to rise, and bumped his head again, although he was on his knees.
"That's odd," he said to himself.
He raised his hand above his head; the roof was perceptibly sinking.
"Great God!" he cried; "wake up, my friends!"
At his shouts Hatteras and Bell arose quickly, striking their heads against the roof; they were in total darkness.
"We shall be crushed!" said the doctor; "let's get out!"
And all three, dragging Simpson after them, abandoned their dangerous quarters; and it was high time, for the blocks of ice, ill put together, fell with a loud crash.