The young man whistled when he saw how near they had come to a hideous death. Several times he had seen the bodies of men who had been suddenly exposed to the pressureless airless cold of the outer void—hideous bloated things through whose skin the livid blood had forced its way.

"Any luck, Jan," he asked, looking back at his companion. "Did you find some cement?"

She shook her head.


CHAPTER VI

The Space Men Attack

First stepping to the oxygen supply valve and opening it a trifle wider, Shelby hastened to assist the girl in her quest. Their ears were ringing. The air pressure within the hull was dropping rapidly. Diligently they ransacked every nook and corner, but found nothing more valuable than a can of thick grease. Shelby smeared some of it over the crevice; it helped but did not by any means check the flow of the escaping air entirely.

"It's a race with time now, Jan," he said quietly.

She looked at him. Her face was a trifle pale, but her lips and eyes were smiling. "Are we on our way to Mars, Captain?" she enquired.

He nodded. "We are, Admiral. The fuel tanks are full and if our air lasts we'll get there."