"After it," I cried to my companion, "and if you reach the pump roomturn loose all the pumps. It is the only chance Barsoom has toexist tomorrow!"

From where I lay I opened the second door, and then the third, andas I saw the hope of Barsoom crawling weakly on arms and kneesthrough the last doorway I sank unconscious upon the ground.

CHAPTER XXVIII

AT THE ARIZ0NA CAVE