Its escape meant the utter ruin of our plan, and in all probability my instant death. This thought lent wings to my feet; but even at my best I could do no more than hold my own with the leaping thing before me.
Of a sudden it turned into an apartment on the right of the corridor, and an instant later as I rushed in I found myself facing two of the Mahars. The one who had been there when we entered had been occupied with a number of metal vessels, into which had been put powders and liquids as I judged from the array of flasks standing about upon the bench where it had been working. In an instant I realized what I had stumbled upon. It was the very room for the finding of which Perry had given me minute directions. It was the buried chamber in which was hidden the Great Secret of the race of Mahars. And on the bench beside the flasks lay the skin-bound book which held the only copy of the thing I was to have sought, after dispatching the three Mahars in their sleep.
There was no exit from the room other than the doorway in which I now stood fac-
