Thorn, on the other hand, seemed like a somewhat disheveled and reckless saint, lured by evil. His tall, gaunt frame increased the illusion. He, too, would have fitted into that history-twisted black dawn, perhaps as a Savonarola or da Vinci. In that age they might have been the bitterest and most vindictive of enemies, but it was obvious that in this they were the most unshakably loyal of friends. One also sensed that more than friendship linked them. Some secret, shared purpose that demanded the utmost of their abilities and put upon their shoulders crushing responsibilities. They looked tired. Clawly's features were too nervously mobile, Thorn's eyes too darkly circled, even allowing for the shadows cast by the groundlight, which waned as the false-sky faded, became ragged, showed the stars. They reached the amphitheater's grassy rim, walked along a row of neatly piled flying togs with distinctive luminescent monograms, spotted their own. Already members of the audience were launching like bats into the summary darkness, filling it with the faint gusty hum of subtronic power, that basic force underlying electric, magnetic, and gravitational phenomena, that titan, potentially earth-destroying power, chained for human use. As he climbed into his flying togs, Thorn kept looking around. False-sky and groundlight had both dissolved, opening a view to the far horizon, although a little weather, kept electronically at bay for the symchromy, was beginning to drift in--thin streamers of cloud. He felt as never before a poignancy in the beauty of utopia, because he knew as never before how near it might be to disaster, how closely it was pressed upon by alien infinities. There was something spectral about the grandeur of the lonely, softly-glowing skylons, lofty and distant as mountains, thrusting up from the dark rolling countryside. Those vertical, one-building cities of his people, focuses of communal activity, gleaming pegs sparsely studding the whole earth--the Mauve Z peering over the next hill, seeming to top it but actually miles away; beyond it the Gray Twins, linked by a fantastically delicate aerial bridge; off to the left the pearly finger of the Opal Cross; last, farther left, thirty miles away but jutting boldly above the curve of the earth, the mountainous Blue Lorraine--all these majestic skylons seemed to Thorn like the last pinnacles of some fairy city engulfed by a rising black tide. And the streams of flying men and women, with their softly winking identification lights, no more than fireflies doomed to drown. His fingers adjusted the last fastening of his togs, paused there. Clawly only said, "Well?" but there was in that one word the sense of a leave-taking from all this beauty and comfort and safety--an ultimate embarkation.