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. Already his mind, strength and will were being taxed to the utmost, he had no time for idle distractions. Yet he had become fascinated by the achievements of an engineer-architect two thousand years dead, belonging to a totally alien culture. And there was the mystery of Kalidasa himself; what was his purpose in building Yakkagala? The king might have been a monster, but there was something about his character which struck a chord in the secret places of Morgan's own heart.

Sunrise would be in thirty minutes; it was still two hours before his breakfast with Ambassador Rajasinghe. That would be long enough – and he might have no other opportunity.

Morgan was never one to waste time. Slacks and sweater were on in less than a minute, but the careful checking of his footwear took considerably longer. Though he had done no serious climbing for years, he always carried a pair of strong, light-weight boots; in his profession, he often found them essential. He had already closed the door of his room when he had a sudden afterthought.

For a moment he stood hesitantly in the corridor; then he smiled and shrugged his shoulders. It wouldn't do any harm, and one never knew…

Once more back in the room, Morgan unlocked his suitcase and took out a small flat box, about the size and shape of a pocket calculator. He checked the battery charge, tested the manual over-ride, then clipped it to the steel buckle of his strong synthetic waist-belt. Now he was indeed ready to enter Kalidasa's haunted kingdom, and to face whatever demons it held.

The sun rose, pouring welcome warmth upon his back as Morgan passed through the gap in the massive rampart that formed the outer defences of the fortress. Before him, spanned by a narrow stone bridge, were the still waters of the great moat, stretching in a perfectly straight line for half a kilometre on either side. A small flotilla of swans sailed hopefully towards him through the lilies, then dispersed with ruffled feathers when it was clear that he had no food to offer. On the far side of the bridge he came to a second, smaller wall and climbed the narrow flight of stairs cut through it; and there before him were the Pleasure Gardens, with the sheer face of the Rock looming beyond them.

The fountains along the axis of the gardens rose and fell together with a languid rhythm, as if they were breathing slowly in unison. There was not another human being in sight; he had the whole expanse of Yakkagala to himself. The fortress-city could hardly have been lonelier even during the seventeen hundred years when the jungle had overwhelmed it, between the death of Kalidasa and its re-discovery by nineteenth-century archaeologists.

Morgan walked past the line of fountains, feeling their spray against his skin, and stopped once to admire the beautifully carved stone guttering – obviously original – which carried the overflow. He wondered how the old-time hydraulic engineers lifted the water to drive the fountains, and what pressure differences they could handle; these soaring, vertical jets must have been truly astonishing to those who first witnessed them.

And now ahead was a steep flight of granite steps, their treads so uncomfortably narrow that they could barely accommodate Morgan's boots. Did the people who built this extraordinary place really have such tiny feet, he wondered? Or was it a clever ruse of the architect, to discourage unfriendly visitors? It would certainly be difficult for soldiers to charge up this sixty-degree slope, on steps that seemed to have been made for midgets.

A small platform, then another identical flight of steps, and Morgan found himself on a long, slowly ascending gallery cut into the lower flanks of the Rock. He was now more than fifty metres above the surrounding plain, but the view was completely blocked by a high wall coated with smooth, yellow plaster. The rock above him overhung so much that he might almost have been walking along a tunnel, for only a narrow band of sky was visible overhead.

The plaster of the wall looked completely new and unworn; it was almost impossible to believe that the masons had left their work two thousand years ago. Here and there, however, the gleaming, mirror-flat surface was scarred with scratched messages, where visitors had made their usual bids for immortality. Very few of the inscriptions were in alphabets that Morgan could recognise, and the latest date he noticed was 1931; thereafter, presumably, the Department of Archaeology had intervened to prevent such vandalism. Most of the graffiti were in flowing, rounded Taprobani; Morgan recalled from the previous night's entertainment that many were poems, dating back to the second and third century. For a little while after the death of Kalidasa, Yakkagala had known its first brief spell as a tourist attraction, thanks to the still lingering legends of the accursed king.

Halfway along the stone gallery, Morgan came to the now locked door of the little elevator leading to the famous frescoes, twenty metres directly above. He craned his head to see them, but they were obscured by the platform of the visitors' viewing cage, clinging like a metal bird's-nest to the outward-leaning face of the rock. Some tourists, Rajasinghe had told him, took one look at the dizzy location of the frescoes, and decided to satisfy themselves with photographs.

Now, for the first time, Morgan could appreciate one of the chief mysteries of Yakkagala. It was not how the frescoes were painted – a scaffolding of bamboo could have taken care of that problem – but why. Once they were completed, no-one could ever have seen them properly; from the gallery immediately beneath, they were hopelessly foreshortened – and from the base of the Rock they would have been no more than tiny, unrecognisable patches of colour. Perhaps, as some had suggested, they were of purely religious or magical significance – like those Stone Age paintings found in the depths of almost inaccessible caves.

The frescoes would have to wait until the attendant arrived and unlocked the elevator. There were plenty of other things to see; he was still only a third of the way to the summit, and the gallery was still slowly ascending, as it clung to the face of the Rock.

The high, yellow-plastered wall gave way to a low parapet, and Morgan could once more see the surrounding countryside. There below him lay the whole expanse of the Pleasure Gardens, and for the first time he could appreciate not only their huge scale (was Versailles larger?) but also their skilful planning, and the way in which the moat and outer ramparts protected them from the forest beyond.

No-one knew what trees and shrubs and flowers had grown here in Kalidasa's day, but the pattern of artificial lakes, canals, pathways and fountains was still exactly as he had left it. As he looked down on those dancing jets of water, Morgan suddenly remembered a quotation from the previous night's commentary:

“From Taprobane to Paradise is forty leagues; there may be heard the sound of the fountains of paradise.”

He savoured the phrase in his mind; the Fountains of Paradise. Was Kalidasa trying to create, here on earth, a garden fit for the gods, in order to establish his claim to divinity? If so, it was no wonder that the priests had accused him of blasphemy, and placed a curse upon all his work.