The sensation of moving rapidly through these dark passages was far from reassuring. I knew not at what moment I might plunge headlong into some terrible pit or meet with some of the ghoulish creatures that inhabit these lower worlds beneath the dead cities of dying Mars. There filtered to me a faint radiance from the torch of the men behind--just enough to permit me to trace the direction of the winding passageways directly before me, and so keep me from dashing myself against the walls at the turns.

Presently I came to a place where five corridors diverged from a common point. I had hastened along one of them for some little distance when suddenly the faint light of the torch disappeared from behind me. I paused to listen for sounds of the party behind me, but the silence was as utter as the silence of the tomb.

Quickly I realized that the warriors had taken one of the other corridors with their prisoner, and so I hastened back with a feeling of considerable relief to take up a much safer and more desirable position behind them. It was much slower work returning, however, than it had been coming, for now the darkness was as utter as the silence.