London was also shrinking. Gaps were opening in the buildings on either side. I could see green pastures with hayricks and herds of cows. Things were losing focus around me. Ahead the River Fleet appeared, and suddenly I was dipping down to cross a stone bridge, while on the other side of the valley there were walls – the ancient walls of London. I only just made it through Ludgate before the actual gates had grown back and barred my way. The old cathedral was long gone; we’d missed the Anglo-Saxons and what modern go-ahead historians like to call the sub-Roman period, and paganism was back in fashion.
If I’d been thinking about it, I probably should have stopped and had a good look around, answered a few important questions about life in Londinium, but I didn’t because that’s when I closed the last couple of metres on Mr Punch and rugby-tackled the dead fucker to the ground.
‘Mr Punch,’ I said. ‘You’re nicked.’
‘Bastard,’ he said. ‘Black Irish bastard dog.’
‘You’re not making yourself any friends here, Punch,’ I said. I got him back on his feet with both his arms jacked far enough up behind his back that he wasn’t going anywhere without at least a broken elbow.
He stopped squirming and turned his head until he could watch me with one eye. ‘So you got me, copper,’ he said. ‘What are you going to do with me now?’
It was a good question, and a sudden savage pain in the hollow of my throat reminded me that I was running out of time.
‘Let’s see what the hanging magistrate makes of you,’ I said.
‘De Veil?’ asked Mr Punch. ‘Yes please, I’m sure he’ll be delicious.’
Revenant, spirit of riot and rebellion, I thought, you idiot. He eats ghosts. I needed something stronger. Brock had written that the genii locorum, the gods and spirits of place, were stronger than ghosts. Was there a god of justice? And where would I find him – or maybe her? Then I remembered: a statue of a woman stands atop the dome of the Old Bailey. In one hand she holds a sword and a set of scales. I didn’t know if there was a goddess of justice or not, but I was willing to bet big money that Mr Punch would know.
‘Why don’t we go and ask the nice lady of the Old Bailey?’ I suggested.
He tensed, and I knew I’d bet right. He struggled again and slammed his head back, aiming for my chin, but that isn’t exactly a new one for a policeman, so I had my head back safely out of reach.
‘You’re going up the steps this time,’ I said.
Mr Punch went limp, defeated I thought, but then he began to shake in my grip. At first I thought he was crying, and then I realised it was laughter. ‘You’re going to find that a bit difficult,’ he said. ‘You seem to have run out of city.’
I looked around and saw that he was right. We’d gone back too far, and now there was nothing left of London but huts and the wooden stake rampart of the Roman camp to the north. There was no stonework at all, nothing but the new-cut smell of oak planking and hot pitch. Only one thing stood complete – the bridge. It was less than a hundred metres away and constructed of square-cut timbers. It looked more like a fishing pier that had got ideas above its station and crossed the river in a fit of exuberance.
I could see a crowd halfway across, sunlight flashing off the brass fittings of a file of legionnaires standing at attention. Beyond them a cluster of civilians in togas chalked to a blinding white for a special occasion and watching a couple of dozen men, women and children in barbaric trousers and brass torcs.
Suddenly I understood what it was Mama Thames had been trying to tell me.
I think Mr Punch understood as well, because he fought me all the way as I dragged him across the bridge and in front of the toga-clad officials. These were more echoes from the past, memories trapped in the fabric of the city – they didn’t react when I threw Punch down before them. I was in Year Five when we did Roman history at school, so we didn’t learn a lot of dates but we did do plenty of group work on what it was like to live in Roman Britain. Which was why I could recognise the officiating priest by the purple-striped stole that covered his head. I could also recognise him by his face, although he looked a lot younger than he had when I’d seen him in the flesh. Plus he was clean-shaven and his black hair hung around his shoulders, but it was the same face that I had last seen propping up a fence at the source of the Thames. It was the spirit of the Old Man of the River as a young man.
Suddenly a great many things became clear to me.
‘Tiberius Claudius Verica,’ I called.