I heard the swish of a broom as someone angrily swept the dead scorpion out of sight. I saw Helena, so pale that I nearly cried out in despair, struggling to smile and reassure me. The tent cleared suddenly. Unseen hands had rolled down the sides. I stood back as Byrria started helping Helena out of her blood-soaked clothing. I went out for warm water and a clean sponge.

A small group were quietly waiting by the fire. Musa stood in silence, slightly apart from them. Someone else prepared the bowl of water for me. Once again I was patted on the back and told not to worry. Without speaking to anyone I went back to Helena.

Byrria saw that I wanted to look after Helena alone; she discreedy withdrew. I heard her voice, chivvying Musa. Something in my head warned me that he might be needing attention.

While I was washing her, Helena suddenly started to collapse from the loss of blood. I laid her down and talked her back to consciousness. After a while I managed to get a clean gown over her head, then made her comfortable with cushions and rugs. We hardly spoke, conveying everything we felt by touch.

Still white-faced and perspiring, she watched me cleaning up. When I knelt down beside her she was smiling again. Then she took my hand and held it against the thick pad of bandages, as if my warmth were healing.

'Does it hurt you?'

'Not badly.'

'I'm afraid that it will.' For some time we stayed there in complete silence, gazing at one another, both now in shock. We were as close as we had ever been. 'There will be scars. I couldn't help it. Oh my darling! Your beautiful arm:' She would never be able to go bare-armed again.

'Lots of bangles!' murmured Helena practically. 'Just think what fun you're going to have choosing them for me.' She was teasing, threatening me with the expense.

'Lucky stroke!' I managed a grin. 'I'll never be in a quandary what to bring you for your gift at Saturnalia:' Half an hour beforehand I had never expected us to share another winter festival. Now she was somehow convincing me that her tenacity would bring her through. The fast, painful throb of my heart settled back to nearly normal as we talked.

After a moment she whispered, 'Don't worry.'

I would have a lot more worrying to do yet.

She stroked my hair with her good hand. Occasionally I felt her tugging gently at the worst tangles amongst the uncombed curls that she had always said she loved. Not for the first time I vowed that in future I would keep myself barbered, a man she could be proud to be seen talking to. Not for the first time I dropped the idea. Helena had not fallen in love with a primped and pungent man of fashion. She had chosen me: a decent body; just enough brains; jokes; good intentions; and half a lifetime of successfully concealing my bad habits from the women in my life. Nothing fancy; but nothing too dire either.

I let myself relax under her fingers' familiar touch. Soon, through calming me, she put herself to sleep.

Helena still slept. I was crouching beside her with my face in my hands when a noise at the tent's entrance roused me. It was Musa.

'Can I help, Falco?'

I shook my head angrily, afraid he would waken her. I was aware that he picked up his knife, hesitantly taking it from where I had dropped it. There was one thing he could do, though it would have sounded harsh and I managed not to say so. A man should always clean his own knife.

He disappeared.

A long while later it was Plancina, the panpipe-player, who came to look in on us. Helena was still drowsing, so I was called outside and fed a huge bowl of the stagehands' broth. Even in the most isolated places, their cauldron was always put on the boil as soon as we stopped. The girl stayed to watch me eat, satisfied with her good deed.

'Thanks. That was good.'

'How is she?'

'Between the poison and the knife cut, only the gods can help her now.'

'Better sprinkle a few pints of incense! Don't worry. There's plenty of us ready to help pray for her.'

Suddenly I found myself in the role of the man with a sick wife. While I was nursing Helena Justina, all the other women in our party would be wanting to act like my mother. Little did they know that my real mother would have knocked them aside and briskly taken charge while I was left with only drink and debauchery to keep me occupied. Still, Ma had had a hard lesson in men, being married to my pa. I didn't have to wonder what my mother would have done with Plancina; I had seen Ma put to flight plenty of floozies whose only social error was being too sympathetic towards me.

'We've been talking to the escorts,' Plancina told me confidentially. 'These things are not fatal in this country. But you'll have to be careful about infection in the wound.'

'Easier said than done.'

Many a fit adult had been terminally stricken after what seemed a minor accident. Not even imperial generals, with the full panoply of Greek and Roman medicine at their disposal, were immune to an awkward graze or septic scratch. Here we were surrounded by sand and dust, with grit working its way everywhere. There was no running water. Indeed there was barely water enough to drink, let alone to clean wounds. The nearest apothecaries must be in Damascus or Palmyra. They were famously good – but days away.

We were talking in low voices, partly to avoid disturbing my lass as she slept, partly from shock. By now I was desperately tired and glad of somebody to talk to.

'I'm hating myself.

'Don't, Falco. It was an accident.'

'It should have been avoidable.'

'Those little bastards are everywhere. Helena just had terrible luck.' Since I was still looking glum, Plancina added with unexpected sympathy, 'She was more careful than anybody else. Helena did not deserve this.'

I had always taken the panpipe-player for a sassy piece. She had a loud mouth, a ferocious turn of phrase, and liked to wear skirts that were slashed from hem to armpit. On a Spartan maiden dancing her way around a redware vase this daring fashion looks the height of elegance; in real life, on a plump little wind-instrument-player, the effect was simply common. I had had her down as one of those girls who have an immaculately presented face, with nothing behind the eyes. But like most girls, dashing men's misconceptions was what she did best. Despite my prejudice, Plancina was extremely bright. 'You notice people,' I commented.

'Not as dumb as you thought, eh?' She giggled good-humouredly.

'I always took you for the clever one,' I lied. It came out automatically; I had been a carefree womaniser once. You never lose the knack.

'Clever enough to know a few things!'

My heart sank.

For an informer, talking privately like this in the lee of quite a different situation can sometimes produce evidence that turns over the whole case. Plancina seemed all too eager for an intimate chat. On a better day I would have seized the chance.

Today I had totally lost the will to proceed. Solving mysteries was the last thing I wanted to bother with. And so, since Destiny is an awkward slut, today she had brought the evidence to me.

I managed to avoid groaning. I knew that Plancina was going to talk to me about Heliodorus or Ione. All I wanted was to wish them, and their killer, at the bottom of the Middle Sea.

If Helena had been sitting out here she would have kicked me for my lack of interest. I spent a few moments reflecting dreamily on the wonderfully curved ankle with which she would lash out – and her power to inflict a memorable bruise.

'Don't look so miserable!' Plancina commanded.

'Give it a rest! I'm heartbroken. I'm off duty tonight.'

'Might be your only chance.' She was bright all right. She knew how fickle witnesses can be.

This reminded me of a game I used to play in the army with my old friend Petronius: speculating which we liked better, bright girls who just looked stupid, or stupid ones who looked passable. On the whole neither kind had looked at either of us when we were twenty, though I used to pretend that I did all right and I reckon he had conquests I never knew about. He certainly turned into a sly reprobate later.