Sword of Fire

They had blundered into a space warp beyond Alpha Centaurus. The Mizar had been flung into an uncharted region of the cosmos, hundreds, perhaps thousands of parsecs from Sol. Hopelessly lost, the chance of ever finding their way back to Earth had been slimmer than trying to locate one certain atom of oxygen in Earth's envelope of air. Briggs had cracked under the strain.

When the co-pilot had failed to relieve him at the end of his watch, Jupiter Jones had switched the controls over to "George," the robot pilot, and had gone in search of him. He'd found Briggs dead in his bunk. An analysis of his stomach had revealed that he'd taken cyanide. There had been no note. Nothing.