For a few minutes we continued rapidly up the steep grade, which I hoped would soon bring us quickly to the upper pits that let into the Temple of Issus. But I was to meet with a cruel disappointment.

Suddenly I heard a cry of "fire" far ahead, followed almost at once by cries of terror and the loud commands of dwars and padwars who were evidently attempting to direct their men away from some grave danger. At last the report came back to us. "They have fired the pits ahead."

"We are hemmed in by flames in front and flood behind."

"Help, John Carter; we are suffocating," and then there swept back upon us at the rear a wave of dense smoke that sent us, stumbling and blinded, into a choking retreat.

There was naught to do other than seek a new avenue of escape. The fire and smoke were to be feared a thousand times over the water, and so I seized upon the first gallery which led out of and up from the suffocating smoke that was engulfing us.