'Well I might have known – if you're involved, Falco.' Scythax stood up stiffly, put down the needle and flexed his fingers. Shadows 6.-om the lamp made his sallow oriental face look cadaverous, below an odd straight fringe he wore, as if he needed to keep his forehead warm or his brain would decay. He always spoke to me warily, as if he feared he was about to discover 1 was carrying a dread infectious disease. 'I will keep this man here; if he survives, it will be best not to move him.' He placed a soft pad over the damage, but bandaged it loosely. 1 guessed he would be needing access at 6.-equent intervals. His hands were gentle as he covered Lentullus with a coarse blanket. 'I have no remit to take in strangers – Rubella won't like this.' 'Understood.' Rubella never liked anything on principle. 'You'll have to provide someone to do the daily nursing. 1 have my own work, you know.' 'We are extremely grateful.' Clemens might be in his first posting as an officer, but he had already learned how to handle civilians. 'I'll stay,' I volunteered. I probably ought to try to find Helena, but she might do better without me. Anacrites would accommodate her with due regard for her father's position and her own known friendship with Titus Caesar. She would not thank me for interfering. That does not mean I was not worried about her. I told Clemens to send me a message when she turned up at home, then I dispatched him and the others to their beds.

I helped Scythax tidy up and clean away the blood. I saw him put opiates ready, but our boy was still deeply unconscious. We worked silently at first; I saw the doctor relaxing. Later we sat on stools with cups of hot mulsum that someone brought us from the night kitchen. I ventured to ask Scythax about the dead man he had had on his work table when we first showed up. 'I know a little about him, that's why I'm curious.' 'He is a vagrant,' answered Scythax, as if! could have missed that. Not likely; the smell of him was reaching us from right outside. 'I know. Almost certainly a runaway slave. Lives in a homeless men's commune out on the Via Appia.' 'Musical. Is he the flautist you've been asking after, Falco?'

'No. Too old, too limited in his range of tunes – and my flautist would be new to the streets. This dead fellow has been starving under bridges for years, by the look of him.' Scythax nodded. When he volunteered nothing more, I enquired how the body came to be here.

It took him a while to respond. Still, he knew I wasn't going away – and he also knew how friendly I was with Petronius. It was either answer me, or have Petro turn up tomorrow asking the questions, by then doubly suspicious. So he answered.

According to Scythax, the corpse had been dumped beside the patrol house gates. He said this happened from time to time. He assumed people hoped there was still life in the victim, and that he might help. The story sounded wrong. But I could think of no other reason a vigiles doctor would have fresh corpses served up to him. '''Victim''?' I asked coolly. 'That would be as in "unnatural death", would it?' 'You tell me, Falco. There seemed to be nothing to show.' Right. There was nothing to show why Scythax was so reticent either. But I heard voices outside, so I left it. The new arrivals were our missing men, Titus and Gaudus. With them was Justinus, intensely anxious about Lentullus. I sent the legionaries home. Scythax stood up and went out, as if leaving us in private; I still felt he was trying to avoid talking to me about that corpse. He still feared I would not let the matter go.

I stared at my brother-in-law. He was now twenty-six or seven, a tall, slim, fairly fit man who had once had a career in front of him, though he had lost hope in that. He must have been able to keep himself clean at the Spy's house, but cannot have shaved for several days. He looked strained. It was more than his dread over the legionary's fate. Bruised circles under those dark eyes the women all fancied marred what could have been a handsome face. Among all that stubble, there was no trace of his normal wide-mouthed grin. 'We need to talk, Quintus.'

In low, level voices, we caught up. It took a while. Justinus maintained he had not known Ganna would be at the Temple of Diana; he was just hoping to find Veleda there. I picked up on that privately, but did not immediately demand how he had known her possible whereabouts.

During the mess with the Guards, Justinus had realised he was about to fall into Anacrites' hands again, so he made a bolt for it. He found a secret wooden stair that led up into the roof; sometimes the goddess made a ritual 'appearance' to the public, displayed at a window above the portico. Titus and Gaudus saw him go, knew he was vital to our task, and quickly ran after him. Later, when it was safe to descend, they had all gone to my house, but when the others returned and said Lentullus was seriously hurt, Justinus insisted on coming here. 'I keep remembering all we went through together in Germany. We all said Lentullus was hopeless – but he came good, Falco.' 'Oh I'll never forget him, swinging on the tail of that bloody great aurochs, without a fear, while the beast plunged about and I was trying to stick a tiny knife in its neck…'

'Heart of gold. You wanted him to keep me out of trouble – yet I ended up getting him into this. I'll never forgive myself, Marcus. He adored you and me.'

‘We gave him the biggest and most exciting adventure of his life. He won't blame you.' Justinus blamed himself, however.

I let him carry on maundering over Lentullus for a while. Then I stopped him: 'So have you seen Veleda?' He looked blank. It had to be an act. 'Or had you merely been in contact with her before Anacrites had you arrested?' He tried to sustain the innocent ploy, so I shouted, 'Camillus Justinus, don't mess me about!' 'Hush!' he remonstrated, gesturing to Lentullus. I fixed a straight glare on him. He must know I was assessing him. He must realise why. He had worked as my assistant for the past couple of years; he knew my methods. 'All right, Falco…' My gaze did not waver. 'I have not seen her.' 'Honest?' 'It's the truth.' 1 believed him. All his family were straight. While 1 had known Justinus keep things to himself-his past liaison with Veleda being one – 1 had never known him tell direct lies. 'You will need to prove it to the world – so give, Quintus!' 'Settle down. We're partners, aren't we? There is no necessity totreat me like a suspect.' There was every need for it. 'Wrong, Quintus. And if you are fooling around with Veleda, ourassociation ends right now.'

He cursed quietly. Then he told me. 'I knew when she arrived in Italy. You were still in Greece… It was supposed to be kept quiet, but Hades, everyone in Rome was talking about it. When she was at that so-called safe house, 1 did try to get messages to her.'

1 wanted to ask how, but first 1 needed to know ifI could trust him. So it was more important to know why. 'Were you hoping to take up where you two left off?' Justinus looked sulky. 'There was nothing to take up.'

'I remember,' 1 said drily. 'I can still see you now, alleging that nothing had happened between you and Veleda, when every single one of us on that ship knew it was a load of rubbish.'

'The ship!' he reminded me. 'She gave us the bloody ship, Falco. She saved our lives by letting us escape down the river. Don't you think we owe her something in return?'

'What? Provide her with a ship to return her to Germany? No, it's too late, Quintus. Rutilius Gallicus has brought her here and she's stuck with her fate. We'll all have to live with it… How did you know about the safe house?' 'What?' 'I want to know, Quintus. How did you know where they had put her? Did she write and tell you?'

'She has never written to me, Falco. 1 don't even know if she can write. The Celts don't believe in writing things down; they commit important stories, facts, myths, histories to memory.'