His face was now tinged with unusual color, and his heart, too, was thumping strangely.
"_Oxygen_!" shouted Waldron, shaking him by the shoulder.

"It--it's leaking in, here, somewhere! If we can't stop it--_we're dead men_!" "Eh?
_What_ ?" stammered the Billionaire, staring at him with eyes of half-intoxicated fear.

"What d'you mean, the oxygen?
In--in here ?" "_In here_!" cried "Tiger," casting a wild and terrible gaze about him at the vast, empty trap of steel.

"Can't you smell it?
That ozone smell?
My God, we're lost! We're lost!" "You're crazy!" retorted Flint, with vigor.

"Nothing of the sort could happen!" His head was held high, now, and new life seemed surging through that spent and drug-wrecked body.