Soft but distinct in the silence that followed this threat, there came a dry, reedy laugh.

Birkin Grif cursed foully. 'At your backs!'he bellowed, lugging out his heavy blade. Horrified by his own lack of foresight, Cromis turned to meet the threat from behind. Sweat was on his brow, the nameless sword was in his hand. Up above, the fish-eagles gyred like ghosts, screaming. The pathway through the pines yawned – a tunnel, a trap, a darkness. He aimed a savage overhand stroke in the gloom, a cut that was never completed.

It was CelIur of Lendalfoot who stood there, the Birduaker.

The Lord Of The Birds was so old that he seemed to have outstripped the mere physical symptoms of his age and passed into a Timelessness, a state of exaltation.

His long, domed skull was fleshless, but his skin was smooth and taut and unwrinkled; so fine and tight as to be almost translucent. His bones shone through it, like thin and delicate jade. It had a faint, yellow tint; in no way unhealthy, but strange.

His eyes were green, clear and amused; his lips were thin.

He wore a loose, unbelted black robe – quilted in grouped arrangements of lozenges – upon which was embroidered in gold wire patterns resembling certain geometries cut into the towers of the Pastel City: those queer and uneasy signs that might equally have been the visual art or the language or the mathematics of Time itself.

They had this property: that, when he moved, they seemed to shift and flow of their own accord, divorced entirely from the motions of 'the cloth of which they were a part.

'Hold your weapon, my lord,'he murmured, as the point of the nameless sword hovered indecisively at his old throat. He eyed the dead lammergeyer dangling from Cromis'belt.

'I see by my bird that you are tegeus-Cromis. You have already left your visit too long. It would be a pity if you were to compound the error by killing the one you came to see.'

He laughed.

'Come. We will go in – 'he indicated his tower. 'You must introduce me to your energetic friend with the power-axe. He would like to kill me, I feel; but he must save that pleasure. No dwarf likes to be made a butt. Ah well.'

Stubborn Grif, however, would have none of it. When Cromis put up his sword, he showed no sign of following. He confronted the old man.

'You are either fool or malefactor,'he said, 'to risk death, as you have just done, for such a silly trick. In coming here, we have killed more men than you have eaten hot meals; and many for less than that practical joke.

'I should like proof that you are 'the former, senile but well-meaning, before I enter your house.

'How, for instance, would any of us know that you are Cellur of Lendalfoot, and not some reproduction as cunningly-fashioned as the bird?'

The old man nodded. He smiled.

'You would know by this, perhaps -'

He raised his arms and tipped back his head until he was gazing up into the darkening spaces where the fish-eagles flew. The diagrams on his robe appeared to fluoresce and writhe. From his throat he forced a wild, loud cry, a shriek compounded of desolation and salt beaches, of wind and sea – the call of a sea-bird.

Immediately, the eagles halted their aimless gyring about the summit of the tower. One by one, they folded their great ragged wings, and, returning the cry, fell out of the sky, the wind humming past them.

For a moment, the air about the Birdmaster was full of sound and motion. He vanished in a storm of wings: and when he reappeared, it was with an eagle perched on each of his outspread arms and ten more on the earth before him.

'They have been constructed, you see,'he said, 'to respond to a vocal code. They are very quick.'

Birkin Grif sheathed his weapon. 'I apologise,'he said.

From the shadows by 'the door, Tomb the dwarf sniggered quietly. He shifted his flickering axe to one shoulder, and came forward, his armour clanking dismally. He held out one huge metal hand to the old man.

'Fool or no, that is a trick I should like to learn.'He studied the perfect iridium plumage of the birds. 'We will make a pact, old man. Teach me to build such things, and I will forget that I am a sensitive and evil-minded dwarf. I am sorry I threatened to mutilate your door.'

Cellur inclined his head gravely.

'I regret that it would have been impossible anyway. You shall learn, my friend. It is necessary that one of you be taught… certain operations. Come.'

He led them into the tower.

It was an ancient place, full of the same undersea gloaming that haunted the airboats of the Afternoon Cultures. There were ten floors, each one a single pentagonal room.

Three of these were given over to personal space, couched and carpeted; the remainder housed equipment of an equivocal nature, like the sculptures unearthed from the Waste. Light curtains hung and drifted; there were captured electrical voices whose function was obscure -'Green,'they whispered. 'Ten green. Counting.'

Tomb, the dwarf walked among them, his expression benign and silly. Suddenly, he said, 'I have wasted forty years. I should have been here, not picking over the detritus of deserts -'

Incomplete carcasses of metal birds lay on the workbenches:

there were eagle owls, and martial eagles, and a black-shouldered kite complete but inert, awaiting some powering-up ritual that would put life into its small and savage eye.

And in the last room, at the summit of the tower, there were five false windows, most precise duplicates of those that lined the throne room at Viriconium and showed landscapes to be found nowhere in the Empire…

There, after they had refreshed themselves, Cellur the Bird-maker told them in his dry manner of the geteit chemosit, and his own strange life:

I have (he said) waited for some time for your arrival. You must understand that there is very little time left. I must have your co-operation if my intervention in this affair is to become concrete and positive. I should have had it earlier. Never mind.

Now: you are aware of the threat posed to Viriconium by Canna Moidart. You are not, however, aware of the more basic threat implicit in her use of what the Northmen – from their trough of ignorance and superstition – have called geteit chemosit, that is to say, 'the brain stealers'.

This threat I must make clear: to do that – and, simultaneously, to set your minds at rest about my own position – I must tell you a little about myself and my queer abode. Please, sir, do not interrupt. It will speed things if you save your questions until I have outlined the broad picture.

Well.

Firstly, I want to make it clear that my involvement in this war is in no way political: the victory of Viriconium is as unimportant to me as the victory of the Northmen, except in one particular – please, Lord Grif, sit down and listen – with which I shall deal presently.

What concerns me is the preservation of the human race on Earth, by which I mean, on this continent, for they are one and the same thing.

Certainly, you may ask who I am, my lord -It is my tragedy that I do not know. I have forgotten. I do

not know when I came to this tower, only that I have been here for at least a millennium.

I have no doubt that I was here during the collapse of what you would call the Afternoon Cultures – that, at that time, I had already been here for at least a century. But I cannot remember if I actually belonged to that rather mysterious race. They are lost to me, as they are to you.

I have no doubt also that I am either immortal or cursed with an extreme longevity: but the secret of that is lost in Time. Whether it was a disease that struck me, or a punishment that was conferred upon me, I do not know. My memory extends reliably for perhaps two hundred years into the past. No further.