THE SILENT INVADERS By CALVIN M. KNOX Illustrated by ED EMSH _Even a perfect disguise creates problems for its wearer. How, for one thing, can he be sure anyone else is what he seems?_ [Transcriber's Note: This etext was produced from Infinity October 1958. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] CHAPTER I The starship _Lucky Lady_ thundered out of overdrive half a million miles from Earth, and began the long steady ion-drive glide at Earthnorm grav toward the orbiting depot. In his second-class cabin aboard the starship, the man whose papers said he was Major Abner Harris of the Interstellar Development Corps stared at his face in the mirror. He wanted to make sure for the hundredth time that there was no sign of where his tendrils once had been. He smiled; and the even-featured, undistinguished face they had put on him drew back, lips rising in the corners, cheeks tightening, neat white teeth momentarily on display. Major Harris scowled, and the face darkened. It behaved well. The synthetic white skin acted as if it were his own. The surgeons back on Darruu had done a superb job on him. They had removed the fleshy four-inch-long tendrils that sprouted at a Darruui's temples; they had covered his deep golden skin with an overlay of convincingly Terran white, and grafted it so skilfully that by now it had become his real skin. Contact lenses turned his eyes from red to blue-gray. Hormone treatments had caused hair to sprout on head and body, where none had been before. They had not meddled with his internal plumbing, and there he remained alien, with the Darruui digestive organ where a Terran had so many incredible feet of intestine, with the double heart and the sturdy liver just back of his three lungs. Inside he was alien. Behind the walls of his skull, he was Aar Khiilom of the city of Helasz--a Darruui of the highest caste, a Servant of the Spirit. Externally, though, he was Major Abner Harris. He knew Major Harris' biography in great detail. Born 2520, in Cincinnati, Ohio, United States, Earth. Age now, 42--with a good hundred years of his lifespan left. Attended Western Reserve University, studying galactography; graduated '43. Entered the Interstellar Redevelopment Corps '46, commissioned '50, now a Major. Missions to Altair VII, Sirius IX, Procyon II, Alpheratz IV. Unmarried. Parents killed in highway jet-crash in '44; no known relatives. Height five feet ten, weight 220, color fair, retinal index point-oh-three. Major Harris was visiting Earth on vacation. He was to spend eight months on Earth before reassignment to his next planetary post.