At another sign from Oro, Yva did something more to the lens—­ again, being alongside of her, I could not see what it was.  The beam of light shifted and wandered till, far away, it fell exactly upon that spot where the rock began to rise into the ridge which separated the two grooves or roads and ended in the razor-edged cliff.  Moreover I observed that Oro, who left it the last of us, had either placed something white to mark this first infinitesimal bulging of the floor of the groove, or had smeared it with chalk or shining pigment.  I observed also what I had not been able to see before, that a thin white line ran across the floor, no doubt to give the precise direction of this painted rise of rock, and that the glare of the search-light now lay exactly over that line.

The monstrous, flaming gyroscope fashioned in Nature’s workshop, for such without doubt it was, was drawing near, emitting as it came a tumult of sounds which, with the echoes that they caused, almost over-whelmed our senses.  Poor little Tommy, already cowed, although he was a bold-natured beast, broke down entirely, and I could see from his open mouth that he was howling with terror.  He stared about him, then ran to Yva and pawed at her, evidently asking to be taken into her arms.  She thrust him away, almost fiercely, and made signs to me to lift him up and hold him beneath my shield.  This I did, reflecting sadly that if I was to be sacrificed, Tommy must share my fate.  I even thought of passing him on to Bickley, but had no time.  Indeed I could not attract his attention, for Bickley was staring with all his eyes at the nightmare-like spectacle which was in progress about us.  Indeed no nightmare, no wild imagination of which the mind of man is capable, could rival the aspect of its stupendous facts.

Think of them!  The unmeasured space of blackness threaded by those globes of ghastly incandescence that now hung a while and now shot upwards, downwards, across, apparently without origin or end, like a stream of meteors that had gone mad.  Then the travelling mountain, two thousand feet in height, or more, with its enormous saucer-like rim painted round with bands of lurid red and blue, and about its grinding foot the tulip bloom of emitted flame.  Then the fierce-faced Oro at his post, his hand upon the rod, waiting, remorseless, to drown half of this great world, with the lovely Yva standing calm-eyed like a saint in hell and watching me above the edge of the shield which such a saint might bear to turn aside the fiery darts of the wicked.  And lastly we three men flattened terror-stricken, against the wall.

Nightmare!  Imagination!  No, these pale before that scene which it was given to our human eyes to witness.

And all the while, bending, bowing towards us—­away from us—­ making obeisance to the path in front as though in greeting, to the path behind as though in farewell; instinct with a horrible life, with a hideous and gigantic grace, that titanic Terror whirled onwards to the mark of fate.