Below him, as the glider climbed the thermals, the first people in the crowd were standing up among their picnic hampers, the officials waving their chequered flags at Halloway. Already they had guessed that he intended to circle the lighthouse. Halloway climbed away from them, making use of the strong updraughts that rose from the heated greenhouses, solar reflectors and rooftops, the warm canals and clay tennis-courts. Already he was looking down, not only at the naval island, but at the distant towers of the city.
When Halloway reached the naval island half an hour later the shoreline of Garden City was far behind him, the lines of solar reflectors forming strips of metallic glitter. He had meant to impress everyone by making a few circuits of the lighthouse before returning, but as he soared above the water he could feel the wind carrying him further across the Sound. At any moment it would be too late to turn back. He waited for the glider to bank to port or starboard, but the sailplane pressed on across the deep water. Already Halloway could see the canyons opening among the officeblocks of the city, an abandoned dream waiting to be re-occupied. Shadow and sunlight alternated between the buildings, as if flashing some kind of cryptic message to him. But Halloway knew that he had made his decision, and why all winter he had been building this strange aircraft.
Borne along by the fronts of warm air, Halloway and his glider made their transit of the Sound. The opposing shorelines had begun to converge, and little more than three miles of water separated the beach communities from the deserted quays and motor-routes of the city suburbs. Exhilarated in a way he had never known before, Halloway gripped the control stick with his knees, and stretched out his arms to seize the vivid air. He was not alone in the sky. On all sides flights of wild birds were crossing the Sound — pintails and white-fronted geese, mallard and harlequin duck. A colony of herring gulls moved below him, changing course when they passed Halloway as if guiding him through the crowded air. No longer hunted by the vegetarian inhabitants of Garden City, immense congregations of water birds thrived around the uninhabited shores of the Sound, in the mud-flats, lagoons and sloughs between the market settlements and the old metropolis.
Ahead of him, across the mercury surface of the sea, a collapsed suspension bridge lay like a drowned saurian in the gateway of the Sound. The last of the market gardens gave way to uncultivated scrubland. The canals petered out among the sandhills. Ten miles from the city, by some unwritten rule, as if they were aware that the physical spell of the metropolis might still intimidate them, the last inhabitants to leave their factories, offices and apartment houses had marked out a no-man’sland to separate themselves from their pasts. Halloway remembered his grandfather’s lurid account (the old man was only too keen to be tricked into these reminiscences) of how the city, like a thousand others around the globe, had gradually come to a halt and shut itself down for ever. When the world’s reserves of fossil fuels had finally been exhausted, when the last coal silos were empty and the last oil-tankers had berthed, the power-stations and railway systems, production lines and steel-works had closed for the last time and the post-technological era had begun.
By then, twenty-five years earlier, there had been few people left anyway. By some unconscious perception of their own extinction, the huge urban populations of the late twentieth century had dwindled during the previous decades. Halloway’s parents had been among the last to leave, abandoning their apartment — the only one still occupied — in one of the high-rise blocks that Halloway could see now emerging from the haze beyond the ruined suspension bridge. Perhaps it was this longpostponed departure that had separated his father from the other inhabitants of Garden City. The small but determined parties of colonists — doctors, chemists, agronomists and engineers — had set out into the rural backwaters determined to build the first scientifically advanced agrarian society. Within a generation they, like countless similar communities around other major cities, had successfully built their pastoral paradise, in a shot-gun marriage of Arcadia and advanced technology. Here each home was equipped with recycling and solar-energy devices, set in its own five acres of intensely cultivated market garden, a self-supporting agricultural paradise linked to its neighbours by a network of canals and I conduits, the whole irrigated landscape heated and cooled, powered and propelled by a technology far more sophisticated in every respect than that of the city they had abandoned, but a technology applied to the waterwheel, the tidal pump and the bicycle.
