'You are not a fool, Ogedai,' Temuge said. 'It was not by chance that your father chose you over older brothers.' Ogedai looked up sharply and Temuge nodded to him. 'At times I wonder if you are a strategist like General Tsubodai. For two years, the nation has been without a leader, without a path, yet there has been no civil war, no struggle between princes.'

'Perhaps they saw my personal tuman riding among them, my scribes and spies,' Ogedai replied softly. 'There were always men in red and black watching them for treachery.'

Temuge snorted. 'It was not fear but confusion that held them. They could not see your plan, so they did nothing. You are your father's heir, but you did not call them to take the oath. No one understands it, so they wait and watch. They still wait to see what you will do next.'

Temuge saw Ogedai's mouth twitch as if he wanted to smile. He longed to know his nephew's mind, but with this new generation, who knew how they thought?

'You have built your city on the plains, Ogedai. The armies have gathered at your call, but now they are here and many of them have seen this glorious place for the first time. Do you expect them simply to bend the knee and give their oath? Because you are your father's son? He has other surviving sons, Ogedai. Have you considered them at all?'

Ogedai smiled at his uncle, amused at the way the man seemed to be trying to pierce his secrets with his gaze. There was one he would not find, no matter how closely he peered. He felt the wine spread its glow inside him, easing his pain like a caress.

'If that was my intention, uncle – to win two years of peace for myself and build a city – well, I have done it, have I not? Perhaps that is all I wanted.'

Temuge spread his hands. 'You do not trust me,' he said, genuine hurt in his voice.

Ogedai chuckled. 'As much as I trust anyone, I promise you.'

'A clever answer,' Temuge said coldly.

'Well, you are a clever man. It's what you deserve,' Ogedai snapped. All the lightness had gone from his manner as he leaned forward. Imperceptibly, his uncle eased himself back.

'At the new moon,' Ogedai went on, 'I will take the khan's oath of every officer and prince of the blood in the nation. I do not have to explain myself, uncle. They will bend the knee to me. Not because I am my father's son, but because I am my father's chosen heir and the leader of the nation.'

He caught himself, as if he was about to say too much, and Temuge watched a shutter drop over his emotions. Here was one son who had learned the cold face early.

'You did not tell me why you came to me tonight, uncle,' Ogedai went on.

Temuge let out a sigh, knowing the moment had slipped away.

'I came to make sure you understood the danger, Ogedai.'

'You are frightening me,' Ogedai said with a smile.

Temuge flushed. 'I am not threatening you.'

'Where can this terrible danger spring from then, in my city of cities?'

'You mock me, though I travelled here to help you and to see this thing you have built.'

'It is beautiful, is it not?' Ogedai said.

'It is wonderful,' Temuge said, with such transparent honesty that Ogedai looked more thoughtfully at his uncle.

'In truth,' Ogedai said, 'I have been considering the need for a man to oversee my library here, to collect scrolls from all corners of the world until men of learning everywhere know the name of Karakorum. It is a foolish dream, perhaps.'

Temuge hesitated. The idea was thrilling to him, but he was suspicious.

'Are you still mocking me?' he said softly.

Ogedai shrugged. 'Only when you blow like an old sheep with your warnings. Will you tell me to watch my food for poison, I wonder?' He saw Temuge's face grow mottled as his peevishness resurfaced and he smiled.

'It is a real offer. Any other man in the tribes can herd sheep and goats. Only you could herd scholars, I think. You will make Karakorum famous. I want it to be known from sea to sea.'

'If you set such a value on my wits then, Ogedai,' Temuge said, 'you will listen to me, this once.'

Ogedai sighed. 'Speak then, uncle, if you feel you must,' he said.

'For two years, the world has waited for you. No one has dared to move a soldier for fear they would be the first example you made. Even the Chin and the Sung have been quiet. They have been like deer who smell a tiger somewhere close. That has come to an end. You have summoned the armies of the nation, and a month from now, if you live, you will be khan.'

'If I live?' Ogedai said.

'Where are your Guards now, Ogedai? You have called them back and no one feels their suspicious eyes riding through the camps. Did you think it would be easy? If you fell from a roof tonight and broke your head on all this stone, who would be khan at the new moon?'

'My brother Chagatai has the best claim,' Ogedai said lightly. 'Unless my son Guyuk is allowed to live. Tolui too is in the line of my father. He has sons grown strong: Mongke and Kublai, Arik-Boke and Hulegu. In time, they could all be khans.' He smiled, amused at something Temuge could not see. 'The seed of Genghis is strong, it seems. We all have sons, but we still look to Tsubodai. Whoever has my father's unbeatable general will carry the army, don't you think? Without him, it would be civil war. Is that all those with power? I have not mentioned my grandmother. Her teeth and eyes are gone now, but she can still be fearsome when roused.'

Temuge stared at him.

'I hope your actions are not as careless as your words. Double your personal guard at least, Ogedai.'

Ogedai nodded. He didn't bother to mention that the ornate walls concealed watching men. Two different crossbows were centred on Temuge's chest at that very moment. It would take only a particular gesture with Ogedai's hand for his uncle to be ripped from life.

'I have heard you. I will consider what you have said. Perhaps you should not take on the role in my library and university until the new moon has come and gone. If I do not survive it, my successor may not have such an interest in Karakorum.' He saw the words sink in and knew that at least one of the men of power would be working to keep him alive. All men had a price, but it was almost never gold.

'I must sleep now, uncle,' Ogedai said. 'Every day is full of plans and work.' He paused in the moment of rising and went on. 'I will tell you this much. I have not been deaf or blind these last years. My father's nation has ceased to conquer for a time, but what of that? The nation has been fed on milk and blood, ready to be sent out into the world with fresh strength. And I have built my city. Do not fear for me, uncle. I know everything I need to know of the generals and their loyalties.'

He came to his feet with the suppleness of youth, while his uncle had to accept his outstretched hand and winced as his knees cracked aloud.

'I think your father would be proud of you, Ogedai,' Temuge said.

To his surprise, Ogedai chuckled.

'I doubt it. I have taken Jochi's bastard son and made him a prince and a minghaan officer. I will raise Batu further still, to honour my brother's memory. Genghis would never forgive me for that.' He smiled at the thought. 'And he would not have loved my Karakorum, of that I am certain.'

He called for Baras'aghur to lead Temuge out of the dark city, back to the stifling air of treachery and suspicion that was so thick in the great camps.

Ogedai picked up his jug and cup, filling the goblet once again as he walked to a stone balcony and looked out at the moonlit streets. There was a breeze blowing, cooling his skin as he stood there with his eyes shut. His heart ached in his chest and he gripped his arm as the pain spread. He felt fresh sweat break out as his veins throbbed and pulsed at frightening speed, soaring for moments until he felt dizzy. He reached out blindly and held the stone sill, breathing slowly and deeply until the weakness left him and his heart beat slowly once again. A great pressure released in his head and the flashing lights dwindled to mere points, shadows that only he could see. He looked up at the cold stars, his expression bitter. Below his feet, another chamber had been cut from the stones. At times, when the pains came with a force that left him trembling and weak, he had not expected even to finish it. Yet he had. His tomb was ready and he still lived. Cup by cup he emptied the jug, until his senses swam.