“Stand by,” he whispered; for in the dread silence even a whisper could be heard,—“stand by, Allan, to throw that bag of ballast over the moment I say the word.”

Viewing it from the sea of ice, no one could calculate how large is the extent of the crater on the top of that mighty mountain cone. It is perfectly circular, and five hundred yards at least in circumference, but it is deeper, far and away, than any volcanic crater into which it has ever been my fortune to peer. Even when the great balloon began to alight in its centre the gulf below seemed bottomless. The Perseverando appeared to be sinking down—down—down into the blackness of darkness. To the perceptions of our heroes, who peered fearfully over the car and gazed below, the gulf was rising towards them and swallowing them up.

I do not think I am detracting in the slightest from their character for bravery, when I say that the hearts of Ralph, Rory, and Allan, at all events, felt as if standing still, so terrible was the feeling of dread of some unknown danger that crept over them. As for De Vere, he was a fatalist of the newest French school, and a man that carried his life in his hand. He never attempted, it is true, any feat which he deemed all but impossible to perform; but, having embarked on an enterprise, he would go through with it, or he cared not to live.

Strange though it may appear, it is just men like this that fortune favours. Probably because the wish to continue to exist is not uppermost in their minds, the wish and the hope to achieve success is the paramount feeling.

Still slowly, very slowly, sunk the balloon, as if unwilling to leave her aerial home. And now a faint shade of light begins to mingle with the darkness beneath them; they are near the bottom of the crater at last.

“Stand by once again,” whispers De Vere, “to throw that anchor over as soon as I tell you.”

A moment of awful suspense.

“Now! now!” hisses De Vere.

Two anchors quit the car at the same time—one thrown by the aeronaut himself, one by Allan, and the ropes are speedily made fast. The balloon gives an upward plunge, the cables tighten, then all is still!

“Ha! ha! she is fast!” cried De Vere, now for the first time showing a little excitement. “Oh, she is a beauty! she has behave most lofely! Look up, gentlemen!—look up!—behold the mighty walls of blue ice that surround us!—behold the circle of blue sky dat over-canopies us!—look, the stars are shining!”