On that chart our single ship-dot was rushing on toward the glowing circles of the galaxy's suns, with the mighty swarm of black dots that were our pursuers close behind, and now I saw that a little ahead of our own ship-dot there hung stationary on the chart another dot, one not of black but of red. Instantly I recognized it as one of the great space-buoys hung in space to mark the positions of the mighty ether-maelstroms which were the most perilous of all the menaces to interstellar navigation. Formed by the meeting of vast ether-currents, these maelstroms had been marked for all space-navigators by placing near each a special space-ship, or buoy, which automatically and without crew kept its position, showing as a red dot on all space-charts to warn passing ships of the maelstrom's position. The great maelstrom ahead, I knew, was one of the mightiest of all in and around our galaxy, and now as our ship sped straight through space toward it I saw Korus Kan's plan and caught my breath with sudden hope. "We'll head straight toward the maelstrom, and then swerve aside just before we reach it," he was saying. "The swarm behind can have no knowledge of its existence, and if they run into it before they can change their course it'll delay them, at least." Tensely I watched now as our ship raced on, the humming roar of its generators rising a half-pitch still higher as Jhul Din, beneath, drove the crew to their last strength to win another light-speed. A scant few million miles ahead the great maelstrom lay, marked only by the red dot on the chart, and as we sped straight on toward that dot our ship already was rocking and bucking as we drove through the mighty ether-currents whose meeting formed the maelstrom. Braced against the room's wall we stood, eyes straining ahead through the darkness and against the glare of the galaxy's suns in the distance, and then, as I turned to glance back, I saw that behind us now there gleamed in the blackness points of shining light, points that were swiftly largening and nearing us, countless in number and driving through space straight on our track. With each fleeting moment they were flashing nearer toward us, and now were so near that through the distance-window I could plainly make out their white-lit pilot rooms as they drove after us. A moment more, I knew, would see them close enough to loose the death-beams upon us, but at that moment there was a half-breathed exclamation from Korus Kan, and I turned swiftly about.