One of the door's marble guardians had an archway cut into its ankle. From this ammonites emerged and then a homunculus behind which a Sapient towered with his hands around its throat. The creature and its master stood themselves before the door.

When Carnelian and the other Masters had drawn close enough, the homunculus put out its hand. Jaspar allowed Cumulus to give his blood-ring for examination first before he pulled his own off and gave it to the creature. Its rheumy old man's eyes flickered along the ring's rim, then it glanced at Carnelian before turning to Jaspar. 'Imago Jaspar, at this time only Ruling Seraphs are permitted at court.'

'I am not yet a Ruling Lord, Sapience.'

Muttering, and then with the Sapient's fingers playing its neck, 'We had not thought your succession was in doubt.'

'Still, one is inexperienced, Sapience. I have brought Imago Khrusos to help me take my first shaky steps at court.'

Jaspar moved aside and the homunculus extended its hand. Carnelian hesitated, removed the ring Jaspar had given him and put it on the hand. The creature examined it, muttering. The Sapient uncoiled a hand from round its neck and flashed out a series of commands. A while later an ammonite put a string of beads in the Sapient's translucent palm. The Sapient freed his other hand and holding one end of the string dropped the rest to the ground. Its beads shone and tinkled. Carnelian watched the Sapient's fingers descend the cord like a spider, feeling the beads as they went. The hands returned the cord to the ammonite before returning to strangle the homunculus. For a while, the Sapient's long silver mask froze, then his fingers twitched and his creature said, 'Very well, Seraphim, the door shall open for you.'

Carnelian was disappointed. He had expected some wonder to lie behind the door but all he could see was a tunnel plainly cut through the rock. There were niches carved into the walls long enough for one of the Chosen to lie in. He became uneasy. He seemed to be standing in the entrance to a tomb.

'We shall meet again in the sky, my Lord,' said Cumulus.

'No doubt,' said Jaspar.

Carnelian watched the Lord Cumulus climb into his palanquin and slide its door closed. The box was lifted and slipped into the tunnel, pulling after it the Master's attendants.

Jaspar flourished his hand in front of Carnelian. 'After you, my Lord.'

Carnelian walked into the tunnel, Jaspar followed him, and the Imago guardsmen and the procession fed in behind. In the plain stone walls, narrow passages could be seen running off on either side. The scuffling seemed to make the air too thick to breathe. Their many-headed shadow stretched longer, moving away from them as if it were being sucked into the gloom ahead. The door closed behind them with a dull thunk, plunging them all into sudden night.

'How do we see?' blurted Carnelian among the mutter-ings of fear.

'We still have the Lord Cumulus' radiance to guide us,' said Jaspar.

Carnelian saw, some way off, lanterns hovering like fireflies around the dark cocoon of Cumulus' palanquin. They carried on, keeping them in sight. Carnelian could hear Jaspar's heavy footfalls, and behind him the clink and patter of his people. His own breathing seemed as loud as the wind.

'Is this then-?' He stopped, startled by how much his voice reverberated. 'Is this then the fabled Labyrinth?' he whispered.

Walking beside him, Jaspar made no reply. Carnelian dropped the matter and they continued in silence. On and on they went with nothing ever changing so that only the movement of his legs convinced Carnelian that they were going forward at all. A dusty odour floated round them that might have been ancient, faded myrrh. Jaspar's people were clearly terrified. Carnelian sensed their trembling in the air. He himself was fighting a growing conviction that they were all descending into the Underworld.

The lanterns up ahead gradually lulled him into a kind of stupor from which a vision only slowly released him. It was like a forest in a dream. The tunnel was coming out into a clearing among twilit trees. It was their appalling immensity that brought Carnelian fully aware. When he looked for it he saw Cumulus' palanquin among the mossy trunks, moving off up a hill accompanied by shadow men. With each step, the vision widened, brightening to a brooding gloom. As he reached the tunnel's end, Carnelian was able to see deeper in among the columned trees. He followed the trunks up and further up to find the canopy of their branches, but when he reached it his eyes could make no sense of what they saw. The branches joined the trees to each other with soaring arches through which he could not see even a glimpse of sky. Angling his head to one side, he found a hole, a scallop-edged disc of blue whose aching incandescence forced him to look away. Wandering high in the half-light, his gaze fell upon a face. Beneath the vaults of branches, one of the trees had a face. It was such a face as a god might have, serene, seeing past all horizons, with thoughts that were clouds in a sky of mind. Peering, Carnelian found that every tree had its face. Focusing on the nearest trunk, he saw it was jointed and that it rose in tiers. It was only then he realized they stood not at the edge of a forest but on the threshold of an endless hall of carved colossal stone.

An Ichorian melting out from the gloom seemed still to carry its stain of shadow all down his left side. There were other signs that this was not an Ichorian of the gates: his collar was of silver, he was armoured with bosses of green bronze like large coins and the cloak that fell about him could have been tar smoke. This was one of the God Emperor's own Sinistral Ichorians. Green and black together were the heraldry of the Gods.

'Where do the Seraphim wish to go?' the Sinistral said, lifting up his tattooed left arm and pointing upwards. To the sky?'

To the sky,' answered Jaspar. Then we shall bear you there, Seraph.' Jaspar turned to Carnelian. 'Is this fabulous enough, cousin?'

Carnelian turned to him in a trance. When he looked back, the Sinistral had disappeared. Only Jaspar's people were there, huddling together like lost children, looking to their feet as if ashamed.

Carnelian's eyes drifted up to roam the vast volumes between the branches where the stone trees had their faces. By moving his head he discovered that some had faces on two sides, one looking to the Plain of Thrones, the other in the direction of the Pillar of Heaven, into the south-west whence the Rains came. He knew that the Labyrinth was built over the birthplace of the Two Gods.

'Do these all represent the Twins?' he asked, keeping his voice low as if he feared he might wake the stone colossi.

'Rather, they are the sarcophagi of God Emperors a thousand years asleep, of their sons, of their Empresses.' Even Jaspar had lowered his voice and Carnelian could hear in it a tinge of awe. Jaspar opened his arms. This columned hall stretches from here to the Pillar, and on either side almost to the shores of the Skymere.'

Carnelian gazed off, hoping to see some distant glimmer of the lake. 'Where do we get this obsession with death?' he murmured.

'My Lord?'

Carnelian had difficulty focusing on something as close as the Master's mask. 'Let us go on, my Lord.'

Jaspar shook his head. 'If we were to go in there unguided we would certainly be lost for days, perhaps indeed for ever.'

Carnelian's eyes searched and found many paths winding off into the twilight. He could not begin to calculate the labour in the building of such a place. His imagination was not large enough to grasp the measure of it. It oppressed him. He felt he was trapped somewhere deep beneath the earth. He longed for a single ray of sun to reach him through the vaults.