He trudged through a landscape of gers, like grubby shells on the shore of some ancient sea. Poverty was all around him: in the yellowing felt, patched and repaired endlessly over generations. Scrawny kid goats and sheep ran bleating around his feet as he approached his home. Batu stumbled over the animals, cursing as water slopped from the heavy buckets. He could smell pungent urine in the air, a sourness that had been missing from the breeze over the river. Batu frowned to himself at the thought of the day he had spent digging a toilet pit for his mother. He had been as excited as a child when he showed the results of his labour. She had merely shrugged, saying she was too old to go so far in the night, when good ground was all around her.

She was thirty-six years old, already broken by sickness and the years passing. Her teeth had rotted in her lower jaw and she walked like a woman twice her age, bent over and limping. Yet she was still strong enough to slap him on the rare occasions Batu mentioned his father. The last time had been just that morning, before he began the trek to the river.

At the door of her ger, he eased the buckets down and rubbed his sore hands, listening. Inside, he could hear her humming some old song from her youth and he smiled. Her anger would have vanished as quickly as always.

He was not afraid of her. In the last year, he had grown in height and strength to the point where he could have stopped every blow, but he did not. He bore them without understanding her bitterness. He knew he could have held her hands, but he did not want to see her weep, or worse to see her beg or barter a skin of airag to ease her misery. He hated those times, when she used the drink to hammer herself into oblivion. She told him then that he had his father's face and that she could not bear to look at him. There had been many days when he had cleaned her himself, her arms flopping over his back, her flat breasts against his chest as he used a cloth and bucket to scrub the filth from her skin. He had sworn many times he would never touch airag himself. Her example made even the smell of it hard on his stomach. When its sweetness was combined with vomit, sweat and urine, it made him retch.

Batu looked up when he heard the horses, grateful for anything that would keep him outside a little longer. The group of riders was small by the standards of a tuman, barely twenty horsemen. To a boy brought up on the edges of the camp, it was a glorious sight for a morning, a different world.

The warriors rode with very straight backs and, from a distance, they seemed to radiate strength and authority. Batu envied them, even as he ached to be one of their number. Like any other boy of the gers, he knew that their red and black armour meant they were Ogedai's own Guard, the elite warriors of the tumans. Stories of their battles were sung or chanted on feast days, as well as darker tales of betrayal and blood. Batu winced at the thought. His father featured in some of those, which prompted sidelong glances at his mother and her bastard son.

Batu hawked and spat on the ground at his feet. He could still remember when his mother's ger had been of the finest white felt and gifts had arrived almost daily. He supposed she had once been beautiful, her skin fresh with youth, where now it was seamed and coarse. Those had been different days, before his father had betrayed the khan and been butchered for it like a lamb in the snow. Jochi. He spat again at the word, the name. If his father had bent to the will of the great khan, Batu thought he might have been one of the warriors in red and black, riding tall among the filthy gers. Instead, he was forgotten and his mother wept whenever he talked of joining a tuman.

Almost all the young men of his age had joined, except for those with injuries or defects of birth. His friend Zan was one, a mix-blood Chin who had been born with a sightless white eye. No one-eyed man could ever be an archer and the warriors had turned him away with kicks and laughter, telling him to tend his flocks. Batu had drunk airag for the first time with him that night and been sick for two days. The recruiters had not come for him either, not with the betrayer's blood running in his veins. Batu had seen them out looking for strong lads, but when their gaze passed over him, they shrugged and turned away. He was as tall and strong as his father had been, but they did not want him.

With a shock, Batu realised the riders were not passing through. He watched as they stopped to speak to one of his mother's neighbours and he took a sharp breath in amazement as the old man pointed in Batu's direction. The horsemen trotted towards him and he stood rooted, watching as they came closer. He found he did not know what to do with his hands and folded them over his chest twice before letting them dangle. From inside the ger, he heard his mother calling some question, but he did not reply. He could not. He had seen the man riding at the head of the group.

There were no pictures in the poor gers, though one or two Chin paintings had found their way into the homes of the wealthiest families. Yet Batu had seen his father's brother once. On a feast day years before, he had crept up close, peering between warriors for a sight of the great khan. Ogedai and Jochi had been with Genghis then and time had not faded the bright memory, among the most bitter-sweet in all his young years. It had been a glimpse of the life he might have had, before his father threw it all away for some petty squabble Batu did not even understand.

Ogedai rode bareheaded, in armour lacquered shining black. He wore his hair in the Chin style, as a heavy rope falling from a topknot on a bare, shaved scalp. Batu drank in every detail of the man as his mother's voice called plaintively again from inside. He could see that the great khan's son was looking directly at him and speaking, but Batu was tongue-tied, dumb. The yellow eyes were bright up close and he was lost in the realisation that he was staring at his uncle by blood.

'Is he slow-witted?' one of the warriors said. Batu shut his open mouth. 'My lord Ogedai is speaking to you, boy. Are you deaf?'

Batu found himself flushing with great heat. He shook his head, suddenly irritated to have such men ride up to his mother's ger. What would they think of the patched walls, the smell, the flies in the air? It was humiliating and his shock turned quickly to anger. Even then, he did not reply. Men like these had killed his father, his mother said. The life of a ragged son would mean little to them.

'Have you no voice at all?' Ogedai said. He was smiling at something and Batu responded crookedly.

'I have,' he said. He saw one of the warriors reach down, but he did not expect a blow and he staggered a step as a mailed glove connected with the side of his head.

'I have, my lord,' the warrior said without heat.

Batu shrugged as he straightened up. His ear was burning, but he'd known worse.

'I have a voice, my lord,' he said, doing his best to remember the warrior's face.

Ogedai discussed him as if he wasn't present. 'It wasn't just a story then. I can see my brother in his face and he's already as tall as my father. How old are you, boy?'

Batu stood very still, trying to collect himself. Some part of him had always wondered if his mother had been exaggerating his father's position. To have it confirmed so casually was more than he could take in.

'Fifteen years,' he said. He saw the warrior begin to lean forward again and added 'my lord' quickly. The warrior leaned back in his saddle and nodded to him complacently.

Ogedai frowned. 'You're old to be starting out. Training should begin at seven or eight at the latest, if you're ever to draw a good bow.' He saw Batu's confusion and smiled, pleased to be able to do such a thing. 'Still, I will be watching you. Report to General Jebe tomorrow. He has his camp about a hundred miles to the north, near a village by a cliff. You can find it?'