Frank and I spent the next week developing Lexie Madison Version 3.0. During the day he pumped people for information about her, her routine, her moods, her relationships; then he came over to my flat and spent the night hammering the day’s crop into my head. I’d forgotten how good at this he was, how systematic and thorough, and how fast he expected me to keep up. Sunday evening, before we left the squad room, he handed me Lexie’s weekly schedule and a sheaf of photocopies of her thesis material. On Monday he had a thick file of her KAs-known associates-complete with photos and voice recordings and background info and smart-arsed commentary, for me to memorize. On Tuesday he brought an aerial map of the Glenskehy area, made me go over every detail till I could draw it from memory, gradually worked his way inwards till we got to floor plans and photos of Whitethorn House. This stuff had taken time to get together. Frank, the fucker, had known long before Sunday night that I was going to say yes.

We watched the phone videos again and again, Frank hitting Pause every few seconds to snap his fingers at some detail: “See that? How her head tilts to the right when she laughs? Show me that angle… See the way she looks at Rafe, and there, at Justin? She’s flirting with them. Daniel and Abby, she looks at straight on; the two lads, it’s sideways and up. Remember that… See her with the cigarette? She doesn’t tuck it into the right-hand side of her mouth, the way you do. Her hand crosses over, and the smoke goes in on the left. Let’s see you do it… See that? Justin starts getting all worked up about the mildew, and straightaway there’s that little glance between Abby and Lexie, and they start talking about the pretty tiles to take his mind off it. There’s an understanding there…” I watched those clips so many times that when I finally went to sleep-five in the morning, mostly, Frank sprawled on the sofa in all his clothes-they slid through my dreams, a constant undercurrent, tugging: the brusque cut of Daniel’s voice against Justin’s light obbligato, the patterns of the wallpaper, the rich tumble of Abby’s laugh.

They lived with a kind of ceremony that startled me. My student life was spur-of-the-moment house parties, frantic bursts of all-night study and non-meals involving crisp sandwiches at weird hours. But this lot: the girls made breakfast at half past seven every morning, they were in college around ten-Daniel and Justin had cars, so they drove the others-whether they had tutorials to give or not, home around half past six and the guys made dinner. On weekends they worked on the house; occasionally, if the weather was good, they took a picnic somewhere. Even their free time involved stuff like Rafe playing piano and Daniel reading Dante out loud and Abby restoring an eighteenth-century embroidered footstool. They didn’t own a TV, never mind a computer-Daniel and Justin shared a manual typewriter, the other three were in enough contact with the twenty-first century to use the computers in college. They were like spies from another planet who had got their research wrong and wound up reading Edith Wharton and watching reruns of Little House on the Prairie. Frank had to look up piquet on the internet and teach me to play.

All this stuff, of course, got right up Frank’s nose and inspired him to more and more creative flights of bitchery (“I’m thinking this is some weird cult that believes technology is the work of Satan and chants to house plants at the full moon. Don’t worry, if they start gearing up for an orgy, I’ll get you out; by the looks of them, it’s not like you’d enjoy it. Who the hell doesn’t have a television?”). I didn’t tell him this, but the more I thought about it, the less bizarre their lives seemed and the more they enchanted me. Dublin goes fast, these days, fast and jam-packed and jostling, everyone terrified of being left behind and forcing themselves louder and louder to make sure they don’t disappear. I had spent my time since Operation Vestal going fast too, headlong and gritted, anything not to stop, and at first the unabashed, graceful leisure of these four-embroidery, for Christ’s sake-was as shocking as a slap. I had forgotten even how to want something slow, something soft, something with wide spaces and its own sure-footed swaying rhythms. That house and that life hung in my mind cool as well water, cool as the shadow under an oak tree on a hot afternoon.

During the day I practiced: Lexie’s handwriting, her walk, her accent-which luckily for me was a light old-fashioned County Dublin, probably picked up from some TV or radio talk-show host, and not all that different from my own-her inflections, her laugh. The first time I got that right-a delighted, helpless bubble of a laugh, running up the scale like a tickled kid’s-it scared the shit out of me.

Her version of Lexie Madison had been, comfortingly, a little different from mine. Way back in UCD, I played Lexie as cheerful, easygoing, sociable, happiest at the center of the action; nothing unpredictable about her, no dark edges, nothing that could make dealers or buyers see her as a risk. At the beginning, at least, Frank and I thought of her as a custom-made precision tool, built to suit our needs and do our bidding, with a very specific goal in mind. The mystery girl’s Lexie had been more mercurial, more volatile, more willful and capricious. She had come up with a Siamese kitten of a girl, all bounce and chatter and little explosions of mischief with her friends, aloof and ice cool with outsiders, and it bothered me that I couldn’t trace that thread backwards and work out what her goal had been, what job she had precision-made this new self to do.

I did consider the possibility that I was making things more complicated than they needed to be, and she had never had a goal at all; that when it came to personality, at least, she was just plain being herself. It isn’t easy, after all, wearing someone else against your skin for months on end; I should know. But the thought of taking her at face value, no pun intended, made me edgy. Something told me that underestimating this girl would be a big, big mistake.

On Tuesday evening Frank and I were sitting on my floor, eating Chinese takeaway off the banged-up wooden chest I use for a coffee table, across a sprawl of maps and photos. It was a wild night, wind slamming at the window in great irregular bursts like some mindless attacker, and we were both in a jittery mood. I had spent the day memorizing KA info and building up enough excess energy that by the time Frank arrived I was doing handstands to keep myself from shooting straight through the ceiling; Frank had come in moving fast, sweeping stuff off the table and talking nonstop while he dealt out maps and food cartons, and I was wondering-there was no point in asking-what was going on, somewhere in the hidden levels of that X-box game he calls a brain, that he wasn’t telling me.

The combination of geography and food calmed us down a little-this was probably why Frank had gone for Chinese; it’s hard to be edgy when you’re full of lemon chicken. “And here,” Frank said, maneuvering the last of his rice onto his fork with one hand and pointing with the other, “that’s the petrol station on the Rathowen road. Open from seven in the morning till three at night, mainly to sell smokes and petrol to locals who’re in no condition to be buying either one. You sometimes do cigarette runs there. Want more food?”

“God, no,” I said. I had startled myself by being starving-normally I eat like a horse, Rob used to be constantly fascinated by how much food I could put away, but Operation Vestal had sort of sidelined my appetite. “Coffee?” I had a pot already going on the cooker; Frank’s eye bags were reaching the point where they would scare small children.