Down into the chamber he dragged me, and across it to the side opposite that at which we had entered. Here was another doorway leading into a corridor which ran directly down a steep incline. Without a moment’s hesitation Woola jerked me along this rocky passage.

Presently he stopped and released me, standing between me and the way we had come, looking up into my face as though to ask if I would now follow him voluntarily or if he must still resort to force.

Looking ruefully at the marks of his great teeth upon my bare arm I decided to do as he seemed to wish me to do. After all, his strange instinct might be more dependable than my faulty human judgment.

And well it was that I had been forced to follow him. But a short distance from the circular chamber we came suddenly into a brilliantly lighted labyrinth of crystal glass partitioned passages.

At first I thought it was one vast, unbroken chamber, so clear and transparent were the walls of the winding corridors, but after I had nearly brained myself a couple of times by attempting to pass through solid vitreous walls I went more carefully.

We had proceeded but a few yards along the corridor that had given us entrance to this strange maze when Woola gave mouth to a most frightful roar, at the same time dashing against the clear partition at our left.

The resounding echoes of that fearsome cry were still reverberating through the subterranean chambers when I saw the thing that had startled it from the faithful beast.

Far in the distance, dimly through the many thicknesses of intervening crystal, as in a haze that made them seem unreal and ghostly, I discerned the figures of eight people—three females and five men.

At the same instant, evidently startled by Woola’s fierce cry, they halted and looked about. Then, of a sudden, one of them, a woman, held her arms out toward me, and even at that great distance I could see that her lips moved—it was Dejah Thoris, my ever beautiful and ever youthful Princess of Helium.

With her were Thuvia of Ptarth, Phaidor, daughter of Matai Shang, and Thurid, and the Father of Therns, and the three lesser therns that had accompanied them.