Stretching away before them till the fog swallowed it--a fog now glowing with light from some source still mist-hidden--an open plaza stretched. This plaza was all surrounded, so far as they could see, with singular huts, built of dressed stone, circular for the most part, and with conical roofs like monster beehives. Windows there were none, but each hut had an open door facing the source of the strange, blue-green light.
Stern could now see the inside of the wall, topped with torches; its crest rose some five feet above the level of the plaza; and, where he could catch a glimpse of its base between the huts and through the crowding folk, he noticed that huge quantities of boulders were piled as though for instant use in case of attack.
A singular dripping of warmish water, here a huge drop, there another, attracted his attention; but though he looked up to determine its source, if possible, he could see nothing except the glowing mist. The whole floor of the enclosure seemed to be wet and shining with this water; and all the roughly clad folk, now coming from the huts and concentrating toward the captives, from every direction, were wet as well, as though with this curious, constant, sparsely scattered rain.
Not a quadruped of any kind was to be seen. Neither cat nor dog was there, neither goat nor pig nor any other creature such as in the meanest savage villages of other times might have been found upon the surface of the earth. But, undisturbed and bold, numbers of a most extraordinary fowl--a long-legged, red-necked fowl, wattled and huge of beak--gravely waddled here and there or perched singly and in solemn rows upon the huts.
"Great Heavens, Beatrice," exclaimed the engineer, "what are we up against? Of all the incredible places! That light! That roaring!"
He had difficulty in making himself even heard. For now the hissing roar which they had perceived from afar off seemed to fill the place with a tremendous vibrant blur, rising, falling, as the light waxed and waned.
Terribly confusing all these new sense-impressions were to Stern and Beatrice in their unnerved and weakened state. And, staring about them as they went, they slowly moved along with the motion of their captors toward the great light.
All at once Stern stopped, with a startled cry.
"The infernal devils!" he exclaimed, and recoiled with an involuntary shudder from the sight that met his eyes.
The girl, too, cried out in fear.
Some air-current, some heated blast of vapor from the vast flame they now saw shooting upward from the stone flooring of the plaza, momently dispelled the thick, white vapors.