Solar system after solar system was found and studied, with like result. But finally, out in space, one of the screens showed activity; a beam was in operation between a vessel then upon the plates and some other station. Kinnison tapped it quickly; and, while observers were determining its direction, hardness, and power, a thought flowed smoothly into the Lensman's brain. "--proceed at once to relieve vessel P4K730. Eichlan, speaking for Boskone, ending message." "Follow that ship, Hen!" Kinnison directed, crisply. "Not too close, but don't lose him!" He then relayed to the others the orders which had been intercepted. "The same formula, huh?" Van Buskirk roared, and "Just another lieutenant, that sounds like, not Boskone himself." Thorndyke added. "Perhaps so, perhaps no." The Gray Lensman was merely thoughtful. "It doesn't prove a thing except that Helmuth was not Boskone, which was already fairly certain. If we can prove that there is such a being as Boskone, and that he is not in this Galaxy--well, in that case, we'll go somewhere else," he concluded, with grim finality. * * * * * The chase was comparatively short, leading toward a yellowish star around which swung eight average-sized planets. Toward one of these flew the unsuspecting pirate, followed by the Patrol vessel, and it soon became apparent that there was a battle going on. One spot upon the planet's surface, either a city or a tremendous military base, was domed over by a screen which was one blinding glare of radiance. And for miles in every direction ships of space were waging spectacularly devastating warfare. Kinnison shot a thought down into the fortress, and with the least possible introduction or preamble, got into touch with one of its high officers. He was not surprised to learn that those people were more or less human in appearance, since the planet was quite similar to Tellus in age, climate, atmosphere, and mass. "Yes, we are fighting Boskonia," the answering thought came coldly clear. "We need help, and badly. Can you--" "We're detected!" Kinnison's attention was seized by a yell from the board. "They're all coming at us at once!"