We made the best of our way to the spot, and found sure enough that the hole was the mouth of a cavern, no doubt the same as that of which da Silvestra wrote.  We were not too soon, for just as we reached shelter the sun went down with startling rapidity, leaving the world nearly dark, for in these latitudes there is but little twilight.  So we crept into the cave, which did not appear to be very big, and huddling ourselves together for warmth, swallowed what remained of our brandy—­barely a mouthful each—­and tried to forget our miseries in sleep.  But the cold was too intense to allow us to do so, for I am convinced that at this great altitude the thermometer cannot have marked less than fourteen or fifteen degrees below freezing point.  What such a temperature meant to us, enervated as we were by hardship, want of food, and the great heat of the desert, the reader may imagine better than I can describe.  Suffice it to say that it was something as near death from exposure as I have ever felt.  There we sat hour after hour through the still and bitter night, feeling the frost wander round and nip us now in the finger, now in the foot, now in the face.  In vain did we huddle up closer and closer; there was no warmth in our miserable starved carcases.  Sometimes one of us would drop into an uneasy slumber for a few minutes, but we could not sleep much, and perhaps this was fortunate, for if we had I doubt if we should have ever woke again.  Indeed, I believe that it was only by force of will that we kept ourselves alive at all.

Not very long before dawn I heard the Hottentot Ventvoegel, whose teeth had been chattering all night like castanets, give a deep sigh.  Then his teeth stopped chattering.  I did not think anything of it at the time, concluding that he had gone to sleep.  His back was resting against mine, and it seemed to grow colder and colder, till at last it felt like ice.

At length the air began to grow grey with light, then golden arrows sped across the snow, and at last the glorious sun peeped above the lava wall and looked in upon our half-frozen forms.  Also it looked upon Ventvoegel, sitting there amongst us, stone dead.  No wonder his back felt cold, poor fellow.  He had died when I heard him sigh, and was now frozen almost stiff.  Shocked beyond measure, we dragged ourselves from the corpse—­how strange is that horror we mortals have of the companionship of a dead body—­and left it sitting there, its arms clasped about its knees.

By this time the sunlight was pouring its cold rays, for here they were cold, straight into the mouth of the cave.  Suddenly I heard an exclamation of fear from someone, and turned my head.

And this is what I saw:  Sitting at the end of the cavern—­it was not more than twenty feet long—­was another form, of which the head rested on its chest and the long arms hung down.  I stared at it, and saw that this too was a dead man, and, what was more, a white man.