At last the long gallery, which had skirted the entire western face of the Rock, ended in another steeply rising stairway – though this time the steps were much more generous in size. But the palace was still far above, for the stairs ended on a large plateau, obviously artificial. Here was all that was left of the gigantic, leonine monster who had once dominated the landscape, and struck terror into the hearts of everyone who looked upon it. For springing from the face of the rock were the paws of a gigantic, crouching beast; the claws alone were half the height of a man.

Nothing else remained, save yet another granite stairway rising up through the piles of rubble that must once have formed the head of the creature. Even in ruin the concept was awe-inspiring: anyone who dared to approach the king's ultimate stronghold had first to walk through gaping jaws.

The final ascent up the sheer – indeed, slightly over-hanging – face of the cliff was by a series of iron ladders, with guard-rails to reassure nervous climbers. But the real danger here, Morgan had been warned, was not vertigo. Swarms of normally placid hornets occupied small caves in the rock, and visitors who made too much noise had sometimes disturbed them, with fatal results.

Two thousand years ago, this northern face of Yakkagala had been covered with walls and battlements to provide a fitting background to the Taprobanean sphinx, and behind those walls there must have been stairways that gave easy access to the summit. Now time, weather, and the vengeful hand of man had swept everything away. There was only the bare rock, grooved with myriads of horizontal slots and narrow ledges that had once supported the foundations of vanished masonry.

Abruptly, the climb was over. Morgan found himself standing on a small island floating two hundred metres above a landscape of trees and fields that was flat in all directions except southwards, where the central mountains broke up the horizon. He was completely isolated from the rest of the world, yet felt master of all he surveyed; not since he had stood among the clouds, straddling Europe, and Africa, had he known such a moment of aerial ecstasy. This was indeed the residence of a God-King, and the ruins of his palace were all round.

A baffling maze of broken walls – none more than waist high – piles of weathered brick and granite-paved pathways covered the entire surface of the plateau, right to the precipitous edge. Morgan could also see a large cistern cut deeply into the solid rock – presumably a water-storage tank. As long as supplies were available, a handful of determined men could have held this place forever; but if Yakkagala had indeed been intended as a fortress, its defences had never been put to the test. Kalidasa's fateful last meeting with his brother had taken place far beyond the outer ramparts.

Almost forgetting time, Morgan roamed among the foundations of the palace that had once crowned the Rock. He tried to enter the mind of the architect, from what he could see of his surviving handiwork; why was there a pathway here? – did this truncated flight of steps lead to an upper floor? – if this coffin-shaped recess in the stone was a bath, how was the water supplied and how did it drain away? His research was so fascinating that he was quite oblivious of the increasing heat of the sun, striking down from a cloudless sky.

Far below, the emerald-green landscape was waking into life. Like brightly-coloured beetles, a swarm of little robot tractors was heading towards the rice-fields. Improbable though it seemed, a helpful elephant was pushing an overturned bus back on to the road, which it had obviously left while cornering at too high a speed; Morgan could even hear the shrill voice of the rider, perched just behind the enormous ears. And a stream of tourists was pouring like army ants through the Pleasure Gardens from the general direction of the Hotel Yakkagala; he would not enjoy his solitude much longer.

Still, he had virtually completed his exploration of the ruins – though one could, of course, spend a life-time investigating them in detail. He was happy to rest for a while, on a beautifully-carved granite bench at the very edge of the two-hundred-metre drop, overlooking the entire southern sky.

Morgan let his eyes scan the distant line of mountains, still partly concealed by a blue haze which the morning sun had not yet dispersed. As he examined it idly, he suddenly realised that what he had assumed to be a part of the cloudscape was nothing of the sort. That misty cone was no ephemeral construct of wind and vapour; there was no mistaking its perfect symmetry, as it towered above its lesser brethren.

For a moment, the shock of recognition emptied his mind of everything except wonder – and an almost superstitious awe. He had not realised that one could see the Sacred Mountain so clearly from Yakkagala. But there it was, slowly emerging from the shadow of night, preparing to face a new day; and, if he succeeded, a new future.

He knew all its dimensions, all its geology; he had mapped it through stereo-photographs and had scanned it from satellites. But to see it for the first time, with his own eyes, made it suddenly real; until now, everything had been theory. And sometimes not even that; more than once, in the small grey hours before dawn, Morgan had woken from nightmares in which his whole project had appeared as some preposterous fantasy, which far from bringing him fame would make him the laughing-stock of the world. “Morgan's Folly”, some of his peers had once dubbed the Bridge; what would they call his latest dream?

But man-made obstacles had never stopped him before. Nature was his real antagonist-the friendly enemy who never cheated and always played fair, yet never failed to take advantage of the tiniest oversight or omission. And all the forces of Nature were epitomised for him now in the distant blue cone which he knew so well, but had yet to feel beneath his feet.

As Kalidasa had done so often from this very spot, Morgan stared across the fertile green plain, measuring the challenge and considering his strategy. To Kalidasa, Sri Kanda represented both the power of the priesthood and the power of the gods, conspiring together against him. Now the gods were gone; but the priests remained. They represented something that Morgan did not understand, and would therefore treat with wary respect.

It was time to descend; he must not be late again, especially through his own miscalculation. As he rose from the stone slab on which he had been sitting, a thought that had been worrying him for several minutes finally rose to consciousness. It was strange to have placed so ornate a seat, with its beautifully carved supporting elephants, at the very edge of a precipice.

Morgan could never resist such an intellectual challenge. Leaning out over the abyss, he once again tried to attune his engineer's mind to that of a colleague two thousand years dead.