"He has known Jay Allison for eight years," Forth said quietly, "and he hasn't recognized you yet." But we let it ride at that, to my great relief, and didn't talk any more about me at all. As we flew under silent whirring blades, turning our backs on the settled country which lay near the Trade City, we talked about Darkover itself. Forth told me about the trailmen's fever and managed to give me some idea about what the blood fraction was, and why it was necessary to persuade fifty or sixty of the humanoids to return with me, to donate blood from which the antibody could be, first isolated, then synthesised. It would be a totally unheard-of thing, if I could accomplish it. Most of the trailmen never touched ground in their entire lives, except when crossing the passes above the snow line. Not a dozen of them, including my foster-parents who had so painfully brought me out across Dammerung, had ever crossed the ring of encircling mountains that walled them away from the rest of the planet. Humans sometimes penetrated the lower forests in search of the trailmen. It was one-way traffic. The trailmen never came in search of _them_. * * * * * We talked, too, about some of those humans who had crossed the mountains into trailmen country--those mountains profanely dubbed the Hellers by the first Terrans who had tried to fly over them in anything lower or slower than a spaceship. (The Darkovan name for the Hellers was even more explicit, and even in translation, unrepeatable.) "What about this crew you picked? They're not Terrans?" Forth shook his head. "It would be murder to send anyone recognizably Terran into the Hellers. You know how the trailmen feel about outsiders getting into their country." I knew. Forth continued, "Just the same, there will be two Terrans with you." "They don't know Jay Allison?" I didn't want to be burdened with anyone--not anyone--who would know me, or expect me to behave like my forgotten other self. "Kendricks knows you," Forth said, "but I'm going to be perfectly truthful. I never knew Jay Allison well, except in line of work. I know a lot of things--from the past couple of days--which came out during the hypnotic sessions, which he'd never have dreamed of telling me, or anyone else, consciously. And that comes under the heading of a professional confidence--even from you. And for that reason, I'm sending Kendricks along--and you're going to have to take the chance he'll recognize you. Isn't that Carthon down there?" * * * * * Carthon lay nestled under the outlying foothills of the Hellers, ancient and sprawling and squatty, and burned brown with the dust of five thousand years. Children ran out to stare at the 'copter as we landed near the city; few planes ever flew low enough to be seen, this near the Hellers.