There were a number of Mahars among our prisoners, and so fearful were our own people of them that they would not approach them unless completely covered from the sight of the reptiles by a piece of skin.  Even Dian shared the popular superstition regarding the evil effects of exposure to the eyes of angry Mahars, and though I laughed at her fears I was willing enough to humor them if it would relieve her apprehension in any degree, and so she sat apart from the prospector, near which the Mahars had been chained, while Perry and I again inspected every portion of the mechanism.

At last I took my place in the driving seat, and called to one of the men without to fetch Dian.  It happened that Hooja stood quite close to the doorway of the prospector, so that it was he who, without my knowledge, went to bring her; but how he succeeded in accomplishing the fiendish thing he did, I cannot guess, unless there were others in the plot to aid him.  Nor can I believe that, since all my people were loyal to me and would have made short work of Hooja had he suggested the heartless scheme, even had he had time to acquaint another with it.  It was all done so quickly that I may only believe that it was the result of sudden impulse, aided by a number of, to Hooja, fortuitous circumstances occurring at precisely the right moment.

All I know is that it was Hooja who brought Dian to the prospector, still wrapped from head to toe in the skin of an enormous cave lion which covered her since the Mahar prisoners had been brought into camp.  He deposited his burden in the seat beside me.  I was all ready to get under way.  The good-byes had been said.  Perry had grasped my hand in the last, long farewell.  I closed and barred the outer and inner doors, took my seat again at the driving mechanism, and pulled the starting lever.

As before on that far-gone night that had witnessed our first trial of the iron monster, there was a frightful roaring beneath us—­the giant frame trembled and vibrated—­there was a rush of sound as the loose earth passed up through the hollow space between the inner and outer jackets to be deposited in our wake.  Once more the thing was off.

But on the instant of departure I was nearly thrown from my seat by the sudden lurching of the prospector.  At first I did not realize what had happened, but presently it dawned upon me that just before entering the crust the towering body had fallen through its supporting scaffolding, and that instead of entering the ground vertically we were plunging into it at a different angle.  Where it would bring us out upon the upper crust I could not even conjecture.  And then I turned to note the effect of this strange experience upon Dian.  She still sat shrouded in the great skin.

“Come, come,” I cried, laughing, “come out of your shell.  No Mahar eyes can reach you here,” and I leaned over and snatched the lion skin from her.  And then I shrank back upon my seat in utter horror.