I stood up, covered in blood. I must have looked terrible. 'One word out of place, or a gesture I don't like, and I'll be happy to show you how the aurochs feels now it's dead!'

The men in the hunting party all backed off slowly. I waved them away with an angry gesture. They moved equally slowly out of sight, taking the Gaul from Lugdunum. I do not know what happened to them afterwards, nor do I care. As Celts, they were at far less risk in Germania Libera than we were.

That night we dined on aurochs steaks, but they had a bitter taste. We set a double watch. No one slept much. We broke camp early, then set off in a southerly direction, hoping that somewhere along the riverbank we might find the dead legate's ship.

We were going home. We had two corpses to bring with us, and more than one of us felt broken-hearted. Soon we all were.

Because, as we tramped on mournfully, we came to a wooded area. A little while after we entered it, we found there were other occupants. There were five times as many of them, and they had spotted us. They were a war band of the horse-riding, Rome-hating Tencteri.

LXI

We were surrounded before we had any inkling, but they did not attack immediately. Perhaps they were as surprised as us to find other people in their woods.

We formed up the recruits into a square-quite well, considering they had only learned the manoeuvre theoretically. Helvetius had taught them, however. As a formation the result was passable. But we all knew that we had too small a square.

The real point of a square is to lock shield-rims all around it in a protective wall. We had no shields.

Justinus was too tired and upset for a flamboyant oration, but he told the recruits to do their best. They exchanged frank glances like veterans; they understood the situation we were in.

It was late afternoon. A fine drizzle filled the woods. We were all unwashed, unfed and cold, with mist spiking our hair. I noticed that our boot-leather had set hard and was curled at the edges, with white tracery from mud and salt. The trees had turned colour in the last week or so. Winter was issuing warnings in the frosty air.

I could smell leaf-mould and fear. This was one crisis too many. It felt like a nightmare where you slither through endless ludicrous disasters, knowing it's a nightmare and that you must escape soon, yet unable to break free and wake safe in your bed with someone friendly soothing you.

We could not understand why the Tencteri had made no move.

Sometimes we could glimpse them between the trees. They were on horseback. Their presence was palpable on every side. We heard their mounts stamping restlessly and their harnesses chinking. Once a man coughed. If he lived in this rising river fog, it was understandable.

They were just out of spear range. For what seemed ages we stood there, straining for the first movement that would mean the end for us. We heard the shuffle of hooves in the crisp fallen leaves. We heard a shifty breeze rustle overhead.

I thought I heard something else.

Justinus and I were standing back to back. He must have sensed my tension for he looked round. I had my face raised full into the drizzle, struggling to catch sound or sense. I had nothing to tell him, but that odd quiet soul had brought back from Veleda's tower his habit of solitary action. He listened too, without comment. Then he let out a yelp and before we could stop him, he broke from the square.

He raced the ten strides to where we had left our scant baggage. Luckily he was zig-zagging, for a lance hissed out of the trees. It missed. Next minute he crouched, with some shelter from our horses. We could see him rummaging furiously. Soon he stood up. He leaned his elbows on a horse to steady himself while he held something. It was the twisted, wide-mouthed trumpet he had brought in his baggage for a lark.

When he blew, it came out as more of a waver than the notes he had produced among the Bructeri, but it still retained clear traces of the second night watch. It must have been the only call he had learned to play.

A shower of Tenctrian arrows and spears tried to silence him. Justinus dropped to the ground with his head covered. But he must have heard, as we all did, another note: clear, high, and professionally sustained. Somewhere, somewhere not far away, a second bronze Roman trumpet had sweetly answered his.

We never saw them leaving. The Tencteri must have silently melted away.

Not long afterwards a vexillation of legionaries from the Fourteenth Gemina marched out of the woods. They were all volunteers. The force had been put together and brought downriver on the initiative of the man who was leading them. Despite my prejudice I have to admit that he was Sextus Juvenalis, the prefect of the camp.

They were looking for their missing legate, but the Fourteenth have always boasted about being thorough, so as well as claiming his body they also rescued us.

LXII

Moguntiacum.

A bridge, a tollbooth, a ridiculous column-and the girl I was longing to see.

The journey had taken sufficient time for us to start readjusting to the real world. However, it might take the world longer to adjust to us savages. Along the river had been civilised towns with baths and Roman food. Civilised contact, too, with men we understood, though for most of the journey we had found ourselves clinging in a tight clique of our own, quarantined by an adventure that seemed too big to discuss.

When we finally landed and returned to the fort we had started from, we took the centurion's ashes to rest in the Principia shrine. As we left the parade-ground, the recruits said goodbye. I would certainly be leaving soon, and their close contact with their senior tribune must also end when Justinus resumed the normal loftiness that was expected from his rank. Our tattered band left us on the Via Principia almost tearfully, but just then a group of passing comrades called out a welcome; we watched a swagger hit them, and they went off visibly boasting. Only Lentullus turned back at the last minute, with a shy wave.

Justinus was having some trouble with his throat. 'I hate to say I'll miss them.'

'Don't worry.' Even I felt subdued. 'You're back in harness, Quintus. There will be plenty of other annoyances:'

He swore cheerfully, in one of the several languages he had picked up for chatting to women.

He had the good idea of sending a message to his legate's secretary that there was so much to report he needed a proper appointment-later. This dodge left us free to go off to his house, pretending to stroll lazily as if we had nothing special in mind.

Helena was in the garden. It was too cold for her to be there, but it had ensured her solitude. She was grieving for us. Her brother and I came out into the portico side by side. Her face seemed to light with excitement almost before she heard our steps; then her only dilemma was which of us to rush to first.

We both held back, to let the other have her. I won in the politeness stakes. I intended to. I meant to let Quintus hug her once, then when he passed on the bundle I would feel free to keep hold of her afterwards. But Helena Justina careered past her brother and fell on me.

He had the grace to smile, before he sadly turned away. 'Stay, friend:'

Helena was very quick. As if she had always intended it, she broke from me and threw her arms round him joyfully. 'Falco, you horror, what have you done to my brother?'

'He grew up,' I said. 'An affliction most people manage to avoid, but when it does strike it tends to hurt.'

She was laughing. I had forgotten just how much I loved that laugh. 'How did this accident happen?'