his thought-screens, the secret of which he had stolen from Velantia, went alone to Arisia, to learn how the Lens gave its wearer such power. He was stopped at the barrier. His thought-screens were useless—the Arisians had given them to Velantia, hence knew how to break them down. He was punished to the verge of insanity, but was finally permitted to return to his Grand Base, alive and sane: "Not for your own good, but for the good of that struggling young civilization which you oppose." Kinnison finally reached Prime Base with the all-important data. By building superpowerful battleships, called "maulers," the Patrol gained a temporary advantage over Boskonia, but a stalemate soon ensued. Kinnison developed a plan of action whereby he hoped to locate Helmuth's Grand Base; and asked Port Admiral Haynes, Chief of Staff of the entire Patrol, for permission to follow it. In lieu of that, however, Haynes informed him that he had been given his Release; that he was an Unattached Lensman—a "Gray" Lensman, popularly so called, from the color of the plain leather uniforms they wear. Thus he earned the highest honor which the Galactic Patrol can bestow, for the Gray Lensman works under no direction whatever. He is as absolutely a free agent as it is possible to be. He is responsible to no one; to nothing save his own conscience. He is no longer of Tellus, nor of the Solarian System, but of the Universe as a whole. He is no longer a cog in the immense machine of the Patrol: wherever he may go, throughout the unbounded reaches of space, he is the Patrol! In quest of a second line upon Grand Base, Kinnison scouted a pirate stronghold upon Aldebaran I. Its personnel, however, were not even near-human, but were Wheelmen, possessed of the sense of perception; hence Kinnison was discovered before he could accomplish anything and was very seriously wounded. He managed to get back to his speedster and to send a thought to Port Admiral Haynes, who immediately rushed ships to his aid. In Base Hospital, Surgeon General Lacy put him together, and, during a long and quarrelsome convalescence, Nurse Clarrissa MacDougall held him together. Lacy and Haynes connived to promote a romance between nurse and Lensman. As soon as he could leave the hospital he went to Arisia in the hope that he might be permitted to take advanced training; an unheard-of idea. Much to his surprise, he learned that he had been expected to return, for exactly such training. Getting it almost killed him, but he emerged infinitely stronger of mind than any man had ever been before. He also now had the sense of perception; a sense somewhat analogous to