‘My son says you are dull.’

I shrugged. Looked at the ground.

‘Very well,’ he dismissed me.

I was still shaking when Philotas and Cleitus found me. They put a cup of wine into me, and thus emboldened, I collected my two new slaves – Antipater actually gave them to me. Myndas was the older and handsomer, and Nichomachus was younger and thin, too tall, with a dreadful wispy beard and pimples worse than mine.

‘Zeus, they look like shit,’ Philotas said. ‘Hey – who are you two and why is Antipater giving you away?’

They both looked at the ground, shrugged and shuffled, like slaves. Nonetheless, it was obvious to me that Myndas had been a free man once. And that Nichomachus never had.

‘I gather both of you can do mathematics?’ I said.

More shuffling.

But Myndas produced an abacus, and proceeded to rattle off some remarkable maths problems, muttering under his breath. Philotas, who liked cruel games, shot problems at him faster and faster – absurd problems, obscene problems.

‘If every soldier fucks his shield-bearer twice a day,’ Philotas said in his nasty, sing-song voice, ‘and if he needs a spoonful of olive oil to get it done each time, and if there’s two thousand footsloggers in the army, how much olive oil does the army need every day?’

Myndas didn’t raise his eyes. ‘How big a spoon, master?’ he asked.

‘Whatever you use yourself,’ Philotas answered, and Cleitus guffawed.

Adolescent humour. With boys, it is the humour of the stronger vented on the weaker, and nothing is weaker than a slave.

But they were my slaves, and I’d never owned a man besides my shield-bearer, so I shook my head.

‘Very funny. Myndas, don’t mind him – he can’t help himself. Some day he’ll get laid and stop talking about it.’ I grinned at Philotas to take out the sting, and got punched – hard – in the shoulder.

But he laid off Myndas. It’s important that your slaves see you as someone who can protect them, and since I was to command a troop, I needed Philotas to see that I had limits and would protect my own.

All fun and games, in the pages.

I needed horses, and so did Cleitus. My pater’s factor was in town with orders to give me anything I wanted – my pater was a distant man, but he did his best to equip me. So I spent his money on two more chargers to support Poseidon, and I gave my two old chargers to Cleitus. I put my two slaves on mules. I went out to Polystratus’s farm and offered him silver to march with me. He was a Thracian himself.

He looked at his wife, his new daughter and his farm – a few acres of weeds and some oats. A hard existence.

‘Double that,’ he said. ‘I need some money.’

‘That’s the pay of a royal companion!’ I said.

Polystratus shrugged. ‘I don’t have to go,’ he said. ‘My wife needs me, and my daughter. I could be starting on a son.’ He looked at her and she smiled, blushed, looked at the ground.

Of course I paid him. I gave him a mina of silver down, and then followed him around while he packed his kit, gave his wife a third of the money and then marched up the hill to the headman. I stood as witness while he used his advance of pay to triple his landownership and to pay the headman’s own sons to till the new land for him while he was absent.

Polystratus was not a typical Thracian.

We rode back together, and I bought him a pair of horses. It was all Pater’s money – what did I care? I got him a good leather spola and a nice helmet with heavy cheekpieces. He had his own spears and sword, and he spent his own money on a donkey. And by evening, he had a pais – a slave boy to carry his gear and do his work.

I had to laugh. But I did so where Polystratus couldn’t see me.

That evening, I found that Myndas was sitting in the courtyard of the barracks, and Nichomachus was writing his sums on wax and saying them back. Since I was the mess-master of the pages, I knew the numbers they were doing like I knew my name, so I stopped and stood with them. They didn’t make mistakes, but in a few moments I surprised them by knowing how to multiply one hundred and ninety-eight pages by six mythemnoi of grain.

This was the first of many generational differences between Philip’s men and Alexander’s men. They hadn’t had Aristotle. They’d learned enough maths to buy a slave to do the work, but I could work Pythagoras’s solutions to geometry in my head. And so could Cassander and so could Philotas and so could Cleitus, on and on.

Myndas kept his eyes down. ‘You . . . can you use this, lord?’ he asked, rattling his abacus.

‘Yes, if I had a mind to,’ I admitted. ‘But I can do most of the numbers in my head – especially any maths to do with the pages and feeding them.’ I slapped him on the back. ‘Has the prince set the army yet? I’ve been gone all day.’

The two slaves shook their heads.

‘You two been fed?’ I asked.

Both shook their heads.

I waggled a finger at Polystratus. ‘Myndas, this is Polystratus. He was once a slave and now he’s free – serving me. He is the head of my household, which you are now in. Polystratus, these two are scribes, so don’t break them cutting firewood. They haven’t eaten since before noon. See to them, will you?’

Polystratus nodded. ‘Scribes?’ he asked. Shrugged. ‘Buy ’em food, or get the cook to shell out?’ he asked me.

‘Buy it in the market today, and get them on the barracks list tomorrow,’ I said. This was the sort of detail you had to remember with an army or with your own slaves – I’d walked off to find Polystratus and left them with no way to get food. So much to learn. Zeus, I was young!

Three days of these preparations, and I spent the last two looking at carts and donkeys and mules, watching wicker baskets filled with grain, shouting myself hoarse at merchants, bellowing with rage when I found I’d been swindled on some donkeys . . .

The fourth morning, the sun still hidden in the east. Two hundred pages, a thousand foot soldiers, a hundred of Parmenio’s Thessalian cavalry leading the way and fifty tame Thracians in our rearguard – and we were off. My baggage carts and donkeys occupied about two-thirds of the column and moved slower than beeswax in winter, and everyone found occasion to mention as much to me as we crawled out of the capital and up into the hills.

The second day out of Pella, Alexander suddenly took all the older companions – except me – and headed off north and west. Cleitus cantered up to me where I was helping get a cart repaired – a broken wheel, the hub was rotten, and I’d bought the damned thing . . .

‘The prince says it will be winter before your carts get to the Thracians!’ he said.

What could I say? I’d been swindled in every direction. I had the worst donkeys in the market and I had apparently bought every old cart in Pella.

But Alexander rode off with Laodon and all the older pages to win glory, and left me with a thousand foot soldiers and the carts. In command.

I chose a campsite on the river – with water, firewood, forage and an easy defence. And when daybreak came, it was pouring with rain and I stayed in camp. I surveyed every cart, declared half a dozen unfit and sent Polystratus to get more from the local farms. Our estates were within half a day’s ride.

Then I took Myndas aside. ‘You let me buy those carts,’ I said.

He stared at the ground.

So I punched him in the head. ‘How much did they pay you, you fuck?’ I said.

He curled into a ball and waited to be hit again. But it was obvious to me that the military contractors had paid off my slave to give me crap.

I found a dozen footsloggers who knew which end of a spokeshave was which, and put them to fixing carts. I had the rest – a thousand of them – cut wood for fires. The rain was as heavy and cold as Tartarus, and we needed those fires. Then I had them cut spruce boughs for bedding. The officers backed me. I had the feeling I was in command exactly as long as I continued to give orders that they liked, but I didn’t get hubris from a few successes because I was still so angry about the carts.