While I'd been doing my sums, the last of the light had faded. I began to feel pretty exposed, which in turn made me feel deeply uncomfortable. I couldn't help remembering that less than a week ago someone had wanted to warn me off something so badly they'd taken the risk of killing me. If they were still around, I made a hell of a target, sitting all by myself in a car.

The answer to my fear was just behind me. I was parked on the opposite side of the street to Brian Lomax's house, about thirty yards further up the hill, outside a substantial Victorian pile with a Bed and Breakfast sign swinging slightly in the chilly wind. I collected a small overnight holdall from the boot, stuffed the law books into it and walked up the short drive.

I'd have taken the landlady on as an investigator any day. By the time I'd paid for a night in advance and she'd left me alone in my spotless little room, I felt like I'd had a bright light shining in my eyes for days. Never mind grace under pressure; there should be a private investigators' Oscar for lies under pressure. At least I was in a suit, which made it easier to be convincing about my imaginary role as a commercial solicitor acting for a local client who was interested in buying property in Manchester to expand his business. She'd gone for the lie, agog at my close-lipped refusal to breach client confidentiality. I was half-convinced that come the morning, she'd be tailing me just for the hell of picking up some juicy local gossip.

My room was, as requested, at the front of the house, and on the second floor, which gave me a better view of Brian Lomax's house than I'd had from the car. Glad to get out of tights and heels, I changed into the leggings, sweatshirt and Reeboks that had been relegated to the emergency overnight kit and settled down in the dark to keep watch. I passed the time dictating my client reports for PharmAce and Ted Barlow. That would take Shelley's mind off romance for a couple of hours.

Nell arrived home about half past six, parking her GTi in the garage. It was gone nine before I saw some more action. Lomax appeared round the side of the house, walking along his drive. He turned right and started towards town. I was out of the room and down the stairs a hell of a lot more quickly than I'd have been able to manage just a couple of days before. If Mortensen and Brannigan ever take on an assistant, I think we're going to have to stipulate 'must be quick healer' on the job description.

He was still in sight as I ran out of the guest house, trying to look like a jogger nipping out for her evening run. At the traffic lights, he turned left, walking up the hill towards the market place. I reached the corner in time to see him entering a pub. Wonderful. I didn't even have a jacket on, and I couldn't follow him into the pub because he knew only too well who I was. Furious, I walked right up to the pub and peered through the stained-glass door. Through a blue haze, I saw Lomax at the bar, talking and laughing with a group of other men, all around the same age. By the looks of it, he was having his regular Thursday night down his local with the lads, rather than meeting a business contact. That much was a relief. I stepped back and had a look round. Across the street, on the opposite corner, there was a fish and chip shop that advertised an upstairs dining room. I had nothing left to lose.

It's amazing how long I can take to work my way through steak pudding, chips, mushy peas, gravy, a pot of tea and a plate of bread and butter. Oddly enough, I actually enjoyed it, especially since I'd missed lunch. Best of all was the spotted dick and custard that tasted better than anything my mother used to make. I managed to make the whole lot string out until half past ten, then it was back out into the cold. Of course, it started to rain as soon as I emerged from the chippy. I crossed to the pub and had another look through the glass. The scene hadn't changed much, except that the pub had got busier. Lomax was still standing at the bar with his cronies, a pint pot in his fist. I couldn't see any point in getting soaked while he got pissed, so I jogged back to the guest house, my dinner sitting in my stomach like a concrete block.

He came back, alone, just on half past eleven. Five minutes later, a light went on in an upstairs room and he appeared at the window to close the curtains. Ten minutes after that, another light went on and Nell did the same thing in her room. I didn't bother waiting for their lights to go out. I bet I was asleep before they were.

I bet I was up before them too. I'd set my alarm for six, and I was out of the shower by quarter past. Lomax's curtains opened at a quarter to seven, and my heart sank. My landlady didn't start serving breakfast till eight, and it looked like he'd be out of the house by then. I consoled myself with the individually wrapped digestive biscuits supplied with the tea- and coffee-making facilities. (Fine if you like sterilized milk, tea bags filled with house dust and powdered instant coffee that tastes like I imagine strychnine does.)

Wearily, I packed my bag and returned to the car. I was beginning to wonder if there was any point to this surveillance. I sometimes think my boredom threshold's too low for this job. Twenty minutes later, the nose of a white E-type appeared in his gateway. I'd seen the Jag sitting next to Nell's GTi in the garage the night I'd spotted the T.R. Harris signboard. The classic car's long bonnet emerged cautiously, until I could see Lomax himself was at the wheel. He drove past me without so much as a glance. I watched him round the bend in my rear-view mirror, then quickly reversed out of the guest house drive and sped after him.

I'd thought the road from Manchester had been bad enough.

The one we took out of Buxton was that nightmare you wake up from in a clammy sweat. The road corkscrewed up through a series of tight bends with sheer drops on the other side, just like in the Alps. Then it became a narrow bucking switchback that made me grateful for missing breakfast. The visibility was appalling. I couldn't decide if it was fog or cloud I was driving through, but either way I was glad there weren't too many side turnings for the E-type to disappear into. What left me gasping with disbelief was the amount of traffic on this track from hell. Lorries, vans, cars by the dozen, all bucketing along as if they were in the fast lane of the M6.

Eventually, we left the grey-green moors behind and dropped into the red brick of Macclesfield. I felt like an explorer emerging from the jungle after a close encounter with the cannibals. These were proper roads, with traffic lights, roundabouts, and white lines up the middle. Through Macclesfield, we emerged into the country again, but this was more my idea of what countryside should be. None of those dreadful moors, heather stretching to infinity, dilapidated dry-stone walls with holes in where someone failed to make the bend, grim pubs stranded in the middle of nowhere and trees that grow at an angle of forty-five degrees to the prevailing wind. No, this was much more like it. Neat fields, pretty farmhouses, Little Chefs and garden centres, notices nailed to trees announcing craft fairs and car boot sales. The kind of country you might just be tempted to take a little run out to in the car.

We roared down the slip road of the M6 at 8:14, according to my dashboard clock. I began to feel excited. Whatever Lomax was up to, it was more interesting than repairing guttering. As the speedo hit ninety, I really began to miss my Nova. It may not have looked much, but it was a car that only really ever seemed to get into its stride over eighty. Unlike the Fiesta, which had an interesting shake in the steering wheel between eighty-two and eighty-eight. As we changed lanes to head west down the M62,I remembered the phone call from Alexis that had started this latest phase of the operation. A passport application form.