"I've just got some of the funniest orders ever put out, Lieutenant"--his voice was low and intense--"but they came from 'way, 'way up. I'm to join the brass hats in the Center. You'll know about it directly, I imagine. Cover me up as much as you can, will you?" And he was gone. Unchallenged he made his way to the control room, and his curt "urgent report for the Captain" admitted him there without question. But when he approached the sacred precincts of the Captain's own and inviolate room, he was stopped in no uncertain fashion by no less a personage than the Officer of the Day. " ... and report yourself under arrest immediately!" the O. D. concluded his brief but pointed speech. "You were right in stopping me, of course," the intruder conceded, unmoved. "I wanted to get in there without giving everything away, if possible, but it seems that I can't. Well, I've been ordered by Virgil Samms to report to the Captain, at once. See this? Touch it!" He held out a flat, insulated disk, cover thrown back to reveal a tiny golden meteor, at the sight of which the officer's truculent manner altered markedly. "I've heard of them, of course, but I never saw one before," and the officer touched the shining symbol lightly with his finger, jerking backward involuntarily as there shot through his whole body a thrilling surge of power, shouting into his very bones an unpronounceable syllable--the password of the Secret Service. "Genuine or not, it gets you to the Captain. He'll know, and if it's a fake you'll be breathing space in five minutes." Projector at the ready, the Officer of the Day followed Cleve into the Holy of Holies. There the grizzled four-striper touched the golden meteor lightly, then drove his piercing gaze deep into the unflinching eyes of the younger man. But that captain had won his high rank neither by accident nor by "pull"--he understood at once. "It must be an emergency," he growled, half-audibly, still staring at his lowly Q. M. clerk, "to make Samms uncover his whole organization." He turned and curtly dismissed the wondering O. D. Then: "All right! Out with it!" "Serious enough so that every one of us afloat has just received orders to reveal himself to his commanding officer and to anyone else, if necessary to reach that officer at once--orders never before issued. The enemy have been located. They have built a base, and have ships better than our best. Base and ships cannot be seen nor detected by any