“Oh!” gasped Beatrice. The engineer stopped as though frozen. His hand tightened on the revolver-butt till the knuckles whitened. And thus, face to face with the Horde, they stood for a long minute.

Neither of them realized exactly the details of that first impression. The narrow slit of view which they had already got through the crack in the wall had only very imperfectly prepared them for any understanding of what these Things really were, en masse.

But both Beatrice and the engineer understood, even at the first moment of their exit there, that they had entered an adventure whereof the end could not be foreseen; that here before them lay possibilities infinitely more serious than any they had contemplated.

For one thing, they had underestimated the numbers of the Horde. They had thought, perhaps, there might be five hundred in all.

The torches had certainly numbered no more than that. But now they realized that the torch-bearers had been but a very small fraction of the whole; for, as their eyes swept out through the forest, whence the fog had almost wholly risen, they beheld a moving, swarming mass of the creatures on every hand. A mass that seemed to extend on, on to indefinite vistas. A mass that moved, clicked, shifted, grunted, stank, snarled, quarreled. A mass of frightful hideousness, of inconceivable menace.

The girl's first impulse was to turn, to retreat back into the building once more; but her native courage checked it. For Stern, she saw, had no such purpose.

Surprised though he was, he stood there like a rock, head up, revolver ready, every muscle tense and ready for whatsoever might befall. And through the girl flashed a thrill of admiration for this virile, indomitable man, coping with every difficulty, facing every peril--for her sake.

Yet the words he uttered now were not of classic heroism. They were simple, colloquial, inelegant. For Stern, his eyes blazing, said only:

“We're in bad, girl! They're on--we've got to bluff--bluff like the devil!”

Have you ever seen a herd of cattle on the prairie, a herd of thousands, shift and face and, as by instinct, lower their horned heads against some enemy--a wolf-pack, maybe?