I rushed back and in an undertone told Petro about the dancer; he whistled enviously at this bonus of my job.

Silvia had organized a main course for me. I managed to cram in a gingered duck wing, a potted salad, and a few mouthfuls of roast pork in plums, then I nipped back to the triclinium hastily. Things had moved on faster than I wanted. The host and most of his private party had dispersed. The two women with the jewellery were talking about their children, ignoring one of the younger men, before whom a different dancer with hypnotic stomach muscles was spiralling majestically.

Judging by the care with which the catering had been ordered, I reckoned my man had emerged now for some heavy social mingling. Making himself agreeable, as Helena Justina called it. Once they had eaten his dinner, people would feel even better about him if they saw him putting himself out to compliment them on their dress sense and enquire after their elder sons' careers. He would be moving round doing good work for himself; Aufidius Crispus was an operator on a determined scale.

I ducked out and started searching through the reception rooms, asking flushed waiters to point out Crispus if he was in sight. A perfume-sprinkler sent me to look for him in an inner peristyle garden, but no luck.

No one was there-except a quiet, solitary woman on a stone seat, looking as if she was waiting for someone. A young woman, in a slim dress and not much jewellery, with fine, dark hair fastened under a round gold net…

It was her own business if she had managed to fix up a treat for herself. I was not about to interfere and spoil her assignation. The only reason I hung around was that a man appeared. He clearly thought she was waiting there for him, and I thought the same. So I stopped, to see who he was.

I didn't know him. But after I had decided that, I stayed there anyway because Helena Justina was giving the impression that neither did she.

He emerged from a group of hibiscus bushes as if he had been up to something a well-brought-up young woman would rather not know. He was drunk enough to greet Helena as a marvellous discovery, yet not enough to be deflected by her frosty attitude. I assumed she could handle it; this swaying lecher was no worse a social menace than M. Didius Falco, droolingly affectionate-and a few brisk insults usually handled me.

This garden was decorated in a simple rustic style. I stood tight against a pillar which was painted with dark diagonal stripes; it was dusk now, so neither of them noticed I was there. He said something which I could not catch, but I gathered her reply: 'No; I'm sitting alone because that's how I want to be!'

The man swung nearer, puffing himself up tipsily. Helena ought to have slipped off straight into the crowd but she was obstinate, and perhaps the fellow she really had planned to meet in the garden seemed worth a few risks. He spoke again, and she insisted, 'No. I'd like you to go!'

He laughed. I knew he would.

Then she did get up. The pale, supple cloth of her gown swung from her shoulder brooches, trying to drape itself straight-emphasizing where the lady beneath it was not.

'For heaven's sake!' Her bitter exasperation struck me at once-but he was far too fluthered with drink. 'My head aches,' Helena raged, 'my heart aches; the noise is making me dizzy and the food is making me queasy! I was sitting by myself because there is nobody I want to be with-especially not you!'

She tried to sweep by, but misjudged it. I was already moving when he caught her arm. Drunk or not, he was quick; his other hand was grappling brutally under her gown as I leapt the low wall which connected the rustic columns and covered the ground between us with a roar. Then I seized him by both shoulders and dragged him off.

There was a crack of heads, one of them mine. He was fairly athletic, and his energy surged unexpectedly, so he landed some punches. Root ginger repeated on me faintly, though I was far too angry to feel much else. Once his accuracy started fading I squared him up and demonstrated my disapproval with a series of unrelenting blows in the parts of his body which my trainer had always advised me never to hit. After that I screwed his head under one elbow and hauled him to a sturdy well where I let a torrent from its fountain spew straight into his lungs.

While he was still on the healthy side of drowning, Helena's low voice warned, 'Stop it, Falco; you're killing the man!'

So I plunged him under a couple more times then stopped.

I propelled him through the colonnade to a corridor, where I sped him on his way with my party sandal in the small of his back. He sprawled headlong. I waited until I saw him starting to struggle upright, then strode back to Helena.

'Why were you skulking?' she accused by way of thanks.

'Coincidence.'

'Don't spy on me!'

'And don't expect me to let you be attacked!'

She was sitting on the rim of the well, hugging herself defensively. I put out my hand to her cheek but she drew back from another male assault; I flinched myself. After a moment she stopped shaking.

'If you still want to sit in the garden I'll stand guard.'

'Did he hurt you?' she asked, ignoring that.

'Not as much as I hurt him.' She frowned. 'He's upset you; you ought to have company.' She exclaimed; I bit my lip. 'Sorry; that was crass. I heard what you said-'

Then Helena Justina let out a whisper which sounded like my private name, snatched the hand she had recoiled from, and buried her face in my palm. 'Marcus, Marcus, I just wanted to be somewhere quiet so I could think.'

'What about?'

'Everything I ever do seems to turn out wrong. Everything I ever want becomes impossible…'

As I struggled to react to this, she suddenly looked up at me. 'I beg your pardon-' Still gripping my hand so I could not escape, she demanded in her normal purposeful voice as if nothing else had happened, 'How are you getting on with Crispus? Have you talked to him yet?'

I confessed I had still not found him. So the noble young lady jumped from her wellhead and decided she had best come and help. I did mention about being sharp, and tough, and good at my job (etcetera). Before I got to the part about how I loathed being supervised, she had hurried me out of the garden and was coming with me whether I wanted her or not.

I should never have allowed this. Her father would disapprove of his flower rushing about, and my sort of work is best done alone.

On the other hand, Helena Justina always did seem to find a plausible reason to ignore social conventions, and as we combed through the great reception rooms I certainly saved time having somebody who could identify the man I was looking for. Or not, in fact; because Crispus was never there.

'Is he a family friend?'

'No; my father hardly knows him. But Pertinax did. When I was married he came to dinner several times…' Turbot in Caraway, no doubt.

As we went out into the spacious formal gardens which extended beyond the central features of the house, she slipped her hand through my arm. I had seen her like this before. Helena hated crowds. The bigger they were, the more her own sense of isolation grew. That was why she was clinging to me; I was still a menace, but I had a friendly face.

'Hmm!' I mused, as we stood at the far end of the garden among fine-scented roses, looking back towards the stupendous fluted pillars of the grand saloon. 'This would be nice work if we had time to enjoy it-' I tilted my wreath to a more debonair angle, but Helena answered severely: 'We don't have time!'