A ringing shattered the silence; I had to hunt for the intercom on the bedroom wall. I said, "Who is it?" and an unfamiliar voice demanded, "Dr. Allison?" I said automatically, "Nobody here by that name," and started to put back the mouthpiece. Then I stopped and gulped and asked, "Is that you, Dr. Forth?" It was, and I breathed again. I didn't even want to think about what I'd say if somebody else had demanded to know why in the devil I was answering Dr. Allison's private telephone. When Forth had finished, I went to the mirror, and stared, trying to see behind my face the sharp features of that stranger, _Doctor_ Jason Allison. I delayed, even while I was wondering what few things I should pack for a trip into the mountains and the habit of hunting parties was making mental lists about heat-socks and windbreakers. The face that looked at me was a young face, unlined and faintly freckled, the same face as always except that I'd lost my suntan; Jay Allison had kept me indoors too long. Suddenly I struck the mirror lightly with my fist. "The hell with you, Dr. Allison," I said, and went to see if he had kept any clothes fit to pack. * * * * * Dr. Forth was waiting for me in the small skyport on the roof, and so was a small 'copter, one of the fairly old ones assigned to Medical Service when they were too beat-up for services with higher priority. Forth took one startled stare at my crimson shirt, but all he said was, "Hello, Jason. Here's something we've got to decide right away; do we tell the crew who you really are?" I shook my head emphatically. "I'm not Jay Allison; I don't want his name or his reputation. Unless there are men on the crew who know Allison by sight--" "Some of them do, but I don't think they'd recognize you." "Tell them I'm his twin brother," I said humorlessly. "That wouldn't be necessary. There's not enough resemblance." Forth raised his head and beckoned to a man who was doing something near the 'copter. He said under his breath, "You'll see what I mean," as the man approached. He wore the uniform of Spaceforce--black leather with a little rainbow of stars on his sleeve meaning he'd seen service on a dozen different planets, a different colored star for each one. He wasn't a young man, but on the wrong side of fifty, seamed and burly and huge, with a split lip and weathered face. I liked his looks. We shook hands and Forth said, "This is our man, Kendricks. He's called Jason, and he's an expert on the trailmen. Jason, this is Buck Kendricks." "Glad to know you, Jason." I thought Kendricks looked at me half a second more than necessary. "The 'copter's ready. Climb in, Doc--you're going as far as Carthon, aren't you?" We put on zippered windbreaks and the 'copter soared noiselessly into the pale crimson sky. I sat beside Forth, looking down through pale lilac clouds at the pattern of Darkover spread below me. "Kendricks was giving me a funny eye, Doc. What's biting him?"