Slowly the mighty door receded before us. I attempted to rise and follow it but I was too weak.
“After it,” I cried to my companion, “and if you reach the pump room turn loose all the pumps. It is the only chance Barsoom has to exist tomorrow!”
From where I lay I opened the second door, and then the third, and as I saw the hope of Barsoom crawling weakly on hands and knees through the last doorway I sank unconscious upon the ground.