They attacked twice and we drove them off with some blood flowing, and then we looked out over the fields, with herds of beautiful horses in every field, and fences of woven hurdle between the herds.

‘Why are they separated?’ Alexander asked me.

I shrugged. ‘We have a mare from Arabia in that field, and we’re putting her with one of our best stallions – Big Ares, over there. He doesn’t think much of her yet,’ I said ruefully, because the stallion was at the far end of the field, ignoring the mare.

‘And over there?’ Alexander asked.

‘Pericles’s herd. The grey is Pericles – an old stallion, but still one of the best, with a healthy dose of Nisean in him from Persia.’

‘And nearer?’ he asked. He was clearly impressed with my knowledge. ‘They’re all different – large and small. Bay and black and white and piebald.’

‘Socrates, my father’s favourite. That field has a special purpose.’ I smiled. ‘It is a secret. Pater is breeding horses that are smart. Only smart horses go into that field.’

Alexander nodded. ‘I’m to have a tutor,’ he said. ‘To help me learn to rule men. And yet your horse farm seems to teach all the lessons I need.’

Later that afternoon, the Thracian children came for us again. But we were ready, and we beat them again, and then we chased them – a dozen of us.

I kissed my pater the next day, because I was going to court to be a page, and Alexander was taking me as a companion. We both knew I was in for a long, tough time. But I thought I wanted it, and he was a fine enough father to let me go. He gave me a fine ring, and a bag of money. I guess he’d been a young man, once.

I rode off, excited to be with my prince, excited to be going full-time to court, excited to be a royal page.

I only went back to the farms to live just once, and that was much later, in virtual exile, as you’ll hear. I never thought, that bright sunny morning, that I was giving up horses and love and friendship and beautiful mornings to spend the rest of my youth avoiding rape and murder while working like a slave.

A royal page.

Alexander’s new tutor was, of course, Aristotle. And almost as soon as I became a royal page, Philip moved Alexander’s household to the Gardens of Midas. We were told it was time for him to leave his mother behind. I’ll speak more of Olympias later, but she was more like a force of nature than a woman. And she tried to rule Alexander rather than guide him.

As a companion – almost a peer – I was educated withthe prince. There were a dozen of us at any time, and I think only Amyntas, Cassander, Hephaestion, Black Cleitus and I went through the whole course with Alexander, although I may be missing somebody. At any rate, we sat through lessons together with Aristotle in the Gardens of Midas, and sometimes, when I was the favoured one, I sat beside Alexander on the stone bench – colder than you can imagine on an autumn morning – while the old oligarch explained exactlywhat Plato meant in the Gorgias, or the proper conduct of a gentleman in a symposium.

Aristotle was one of us, or close enough – he knew what we were – but he’d been away a long time, with foreigners on Lesbos, and he could be quite naive. He loved the symposium and all of its trappings – the proper wine bowls, the krater, the sieve and the silver ladle, the bowls of good companionship, the small talk and the wit. I experienced them all later, and came to know that the philosopher was talking about something real – delightful, in fact. But you must imagine that we heard him through a veil of our own experience as pages at court, and for us, wine meant trouble. When we were at Pella, all of us – except the prince – were royal pages, and we waited on the guests at the feasts in the great hall. And that was horrible.

Philip’s court had three groups. The first, and most dangerous, were the highlanders, the near-barbarians of the ancient upland kingdoms; Elimiotis in the south, Orestis in the west and Lychnitis by the lake, near Illyria. They didn’t like Hellenes, didn’t like Philip’s insistence on the trappings of Athenian culture and didn’t very much like Philip. They liked to steal cattle and kill each other and fuck.

The second group was just as dangerous and just as violent. Philip attracted mercenaries the way rotting corpses attract carrion crows. He had the best – and most expensive – captains in the world, and the two I remember best were Erigyus and Laomedon, descendants of Sappho’s daughter, from Mytilene on distant Lesbos. Despite their air of culture and their distinguished poetic pedigree, they were hard men, killers with no shame in them, and no page ever came close to them once the drink was flowing.

And the last group was the lowlanders, the courtiers, the great nobles and barons of the rich inner provinces of Macedon, men who had estates the size of small countries. They wore Greek clothing and most of them spoke excellent Greek, and theycould speak intelligently about Plato. They were also as tough or tougher than their highland cousins, and their national sports were hunting wolves and regicide. My father was one of them, Lagus, son of Ptolemy. Our estates ran for parasanges – we owned people as Attic farmers own sheep, although, as I said, my pater was a fine leader and manager.

The leader of our faction at court was Parmenio, the general – Philip liked to joke that the Athenians managed to come up with ten generals every spring, while he’d only found one in his whole life – that was how much he valued Parmenio. Well he might.

At any rate, when men gathered to drink wine in the royal court at Pella, we pages served as quickly as we could and huddled together for safety under the eaves. Men diedwhen the wine was flowing. And if anyone talked about Socrates or Heraklitus, I never heard it. Casual fornication was tolerated – slave girls and sometimes boys were used as freely as wine cups. One of my clearest memories of youth remains serving wine to Erigyus while he rode a girl on his couch. Beyond them, a highlander was kneeling on the floor, watching, incredulous, as his life ebbed away, blood all around him like spilled wine. He’d mocked Erigyus’s penis. The Lesbian cut his throat and carried on. Thatwas the closest thing we knew to a symposium, and thatwas why it was sometimes difficult to understand what Aristotle was talking about.

I don’t mean to dwell on my own youth. I mean this to explain – to myself, if not to you – why we killed the king, in the end. But to understand Alexander, you have to understand everything, and as with Aristotle’s lessons, it can be hard to see Alexander through the haze of later events. And to understand the man, you have to see some of the boy.

I observed Alexander on dozens of hunts, but one sticks in my head. We’d been hard at it – lesson after lesson, swordsmanship and ethics, wrestling and spear-fighting and running and ethics, the lyre and ethics. The physical world – the bodies of men and women, with dissection; medicine, in detail – how to make drugs from herbs, how to grind powders, how to administer even the most complex concoctions. And political philosophy, too – we were, after all, the men who would rule Macedon, not a group of merchants’ sons, and we were being trained carefully.

Like any group of boys, we had an established pecking order and it was ruthless and yet curiously malleable, and boys went up and down the ladder swiftly. Alexander headed it – he was to be king, and that was that. Indeed, he was not the strongest, the fastest or the best swordsman – but he was almostthe best in every category, and he was, without a doubt, the most intelligent of us. Sometimes it seemed to us that he alone understood what Aristotle was talking about, and certainly, when it came to swordsmanship, or spear-fighting, what he lacked in reach and leg length he often made up for in subtlety and practice.