Murray Leinster,
Talents, Incorporated
“ Bors frowned worriedly.The fleet of Mekin continued in overdrive, heading for Kandar. Each second it traversed a distance equal to the span of a solar system, out to its remotest planet. A heartbeat that would begin where a pulsing Cepheid, had it been possible to see, would have seemed at its greatest brilliance, and would end where the light from that same giant star seemed dimmed almost to extinction. Of course no such observation could be made from any ship in overdrive. Each one of the many, many ugly war-machines was sealed in its own cocoon of overdrive-stressed space. ”

