‘As machines become more like men,’ said Nightingale, ‘I suppose it follows that they might start producing magic of their own. I’m not sure I see how this helps us.’ I tried not to wince at the pseudoscience, and decided now was not the time to get into that.

‘In the first instance,’ I said, ‘it means we know that whatever is doing this is sucking down enormous amounts of power, and second, it gives us another thing to look for.’

Not that we were actually finding anything. In the meantime, Seawoll’s Murder Team were assigned a particularly pointless stabbing in a pub off Piccadilly Circus. I had a sniff around but there were no vestigia, and a stupid but comprehensible motive. ‘Cheating boyfriend,’ Lesley explained one night when she came round to watch a DVD. First, boy meets girl, girl sleeps with second boy, first boy stabs second boy and runs away. ‘We think he’s hiding in Walthamstow,’ she said. Many would say that was punishment enough.

The murders outside J. Sheekey’s were blamed on Michael Smith, who had supposedly shot three people in the head with an illegal firearm before killing himself with the same gun. The media might have taken more of an interest had not a soap star been caught cottaging with an equally famous footballer in the loos of a club in Mayfair. The resulting media white-out blotted out any real news for two weeks and was, according to Lesley, far too convenient to be a coincidence.

I spent April practising my forma, my Latin and experimenting with new ways to blow up microchips. Every afternoon I’d take Toby out for a walk in the area around Covent Garden and Cambridge Circus to see if either of us picked up a sniff, but there was nothing. I called Beverley Brook a couple of times, but she said that her mother had told her not to have anything to do with me until I’d done something about Father Thames.

May started in typical Bank Holiday fashion, with two days of rain and three of drizzle, until the next Sunday dawned bright and fair. It’s on a day like this that a young man’s mind turns to romance, ice cream and Punch and Judy shows.