Defeated by my utterly reasonable attitude, she sighed. 'Thank you.' She forced an arm free and pointed across the water. The river was narrower here than at Moguntiacum, but still so wide that in the darkness we could barely make out the other side. If there were lights, we could not see them. 'Look over there, Marcus. It's almost a different continent. Over there is the antithesis of everything Roman. Nomadic peoples. Nameless gods in wilderness places. No roads. No forts. No towns. No Forum; no public baths; no courts. Nothing organised and no authority to appeal to.'

'And no you,' I said.

I was quite certain she would ask me not to leave. Perhaps she herself had even intended to. Instead, she somehow found a rose-tree and wrenched off a flower for us. With roses it takes some force. She was a girl who had her moments of violence.

We shared the intensity of the flower's perfume. 'I'm here, lady. I'm still listening.'

She was sucking the side of her finger where a thorn had gone in. 'Claudia was right. You defend me. Ever since we met, you have been there-whether I wanted it or not. In those days you even seemed to dislike me, but you were already changing me. I had always been the first-born, the elder sister, the big cousin, the headstrong, bossy, sensible one. Everyone always said, " Helena Justina looks after herself:" '

I thought I could see where she was heading. 'People love you, my darling. Your family, your friends, my family-they all worry about you the same as I do.'

'You are the only person I accept it from.'

'Is that what you wanted to say?'

'Sometimes I'm afraid to let you know how much I need you. It seems too much to ask when you have given me so much.'

'Ask whatever you want.' I was still waiting for the big request not to go. I should have known better.

'Just make sure you come back.' Helena spoke without drama. There was no need to reply. For two barleycorns I would have ordered the Emperor to wrap up his mission in vine leaves and run his triumphal chariot over it. But Helena would have hated that.

I told her she was beautiful. I told her I loved her. Being a fair girl and well tutored in etiquette, she made corresponding remarks about me. Then I closed the shutter on the lamp so Colonia Claudia Ara Agrippinensium (Ara Ubiorum) should not have to know that on its neatly dressed quayside a plebeian with all the status of a frowsty water-rat was taking extravagant liberties with the daughter of a senator.

XL

We left the next day. I managed to shed Xanthus, but Justinus, who ought to have known better, smuggled his dreadful dog aboard.

Once again my imperial pass had obtained transport in a vessel of the official fleet. I also discovered that Justinus equipped expeditions in style. He had brought along horses, three leather tents, arms, provisions and a chest of cash. Only the quality of his manpower proved a disappointment, though since I was used to travelling solo on missions like this, I did not complain. One moment of uplift came when Justinus and I went to the dockside: the centurion supervising the loading of our ship was Helvetius.

'What's this?' I grinned. 'You commanding my escort? I thought you had too much sense for a crazy detail like that.'

Not for the first time I caught that fractional hesitation before he quipped back, 'Unluckily for you. It means your escort is two tent parties of my knock-kneed recruits.' It was bad news, but some of them were within earshot so we had to be fairly polite. 'I tried to pick out the best for you.' Helvetius had still brought me a basket of windfalls that were growing heavy mould.

'We've a hundred miles of sailing yet,' I told the centurion. 'And plenty of room on deck. I can help with extra arms practice.' It would get me in shape too. 'We should have them drilled into decent material by the time we disembark at Vetera.'

The same hint of diffidence darkened his face. 'So you're starting from Vetera?'

I thought he suspected me of being just another sightseer. 'There's nothing ghoulish in it. I'm starting where Lupercus left.'

'Wise.'

His laconic reply convinced me I had been prodding at some personal tragedy.

We were sailing out into the great plain of the lower Rhenus. The right bank between here and the River Lupia formed the territory of the Tencteri, a powerful tribe, and one of the few in Europe apart from the Gauls who made considerable use of horses. They had been firm friends of Civilis during the rebellion, eager to cross and harry our supporters-especially Colonia. They had retreated back across the water now. Still, wherever the channel allowed it, our ship clung to our own left bank.

Beyond the Tencteri lived the Bructeri. All I knew about them was their legendary hatred of Rome.

Since we had brought the pedlar Dubnus with us, we sometimes asked him questions about the east bank. His evasive answers only churned up our fears. Dubnus was producing a poor response to the lure of adventure; he seemed to regard himself more as a hostage than our fortunate scout and interpreter. He complained a lot. We were disgruntled too, mainly about him, but I laid down that we were all to coddle him. He had to believe we were sympathetic if we were going to be able to trust him as a guide.

Our days were spent exercising. We passed it off as a leisure activity; it was the easiest way to cope. But we all knew that we were hardening our bodies and preparing our minds for an adventure which could finish us.

Camillus Justinus had now confessed to me that he had his commander's permission to come the whole distance. I made no comment. His legate probably thought the lad had been working too hard; they both probably saw this excursion as a reward for enterprise.

'I wondered how we had managed to acquire the fabulous supply train! So it's down to your honoured presence: I take it you never told Helena?'

'No. Do you think she realised?'

'Whether she did or not, you'd better write to her from Vetera.'

'I will. She won't forgive me otherwise.'

'More to the point, Justinus, she won't forgive me.'

'Will she think you encouraged me?'

'Probably. And she won't like having both of us at risk.'

'She seemed very concerned about you,' he remarked. 'Visiting the witch in the woods, I mean. Was that based on past experience?'

'Your sister knows any suggestion of me succumbing to Veleda is a lie!' He looked startled by my anger. After a moment, I sighed. 'Well, you know the traditional method of dealing with a fatal beauty among your enemies.'

'That's part of the lecture on strategy I must have missed,' Justinus answered, rather coolly.

'Well, you take them to bed and give them a night of pleasure like nothing they have ever known. Next morning, thanks to your fabulous equipment and brilliant technique, they sob and tell you everything.'

'Your niece is right. You make things up, Falco.'

'It's just a myth.'

'Ever done it? In your past life, of course,' he added, in deference to Helena.

'Ha! Most women I know would cry, "Push off, chancer, and take your puny equipment with you!",' I hedged modestly.

'So why is my sister so worried?'

'The myth,' I said, 'is very deep-seated. Think of Cleopatra, Sophonisba-'

'Sophonisba?'

'Daughter of Hasdrubal and wife of the king of Numidia. She was notoriously beautiful.' I sighed again. This time it was an old man's sigh. 'How much education did they waste on you? The Punic Wars, sonny. Ever heard of Scipio?'

'I certainly never heard of the mighty Scipio bedding Carthaginian princesses!'

'Quite right. Scipio was a wise general.' And probably a good Roman prude.

'So?'

'Scipio made sure he never met her. He sent his lieutenant, Masinissa, to the beauty's tent instead.'