Slowly, as he watched the first pre-dawn light glimmer on the ceiling of his hotel bedroom, and heard the bell-like cries of alien birds, he began to marshal his thoughts. He would never have become a senior engineer of Terran Construction if he had not planned his life to avoid surprises. Although no man could be immune to the accidents of chance and fate, he had taken all reasonable steps to safeguard his career – and, above all, his reputation. His future was as fail-safe as he could make it; even if he died suddenly, the programmes stored in his computer bank would protect his cherished dream beyond the grave.

Until yesterday he had never heard of Yakkagala; indeed, until a few weeks ago he was only vaguely aware of Taprobane itself, until the logic of his quest directed him inexorably towards the island. By now he should already have left, whereas in fact his mission had not yet begun. He did not mind the slight disruption of his schedule; what did perturb him was the feeling that he was being moved by forces beyond his understanding. Yet the sense of awe had a familiar resonance. He had experienced it before when, as a child, he had flown his lost kite in Kiribilli Park, beside the granite monoliths that had once been the piers of the long-demolished Sydney Harbour Bridge.

Those twin mountains had dominated his boyhood, and had controlled his destiny. Perhaps, in any event, he would have been an engineer; but the accident of his birthplace had determined that he would be a builder of bridges. And so he had been the first man to step from Morocco to Spain, with the angry waters of the Mediterranean three kilometres below – never dreaming, in that moment of triumph, of the far more stupendous challenge that still lay ahead.

If he succeeded in the task that confronted him, he would be famous for centuries to come.