If the matter had been local-say, a Triad dispute-it was unlikely that a white guy would have been brought in for the job. The Triads, Chinese “secret societies” with deep roots in Macau and the mainland, tend to settle their affairs themselves. Adding up the available data, therefore, and taking myself off the short list of possible targets, I was left with Belghazi as the most likely recipient of Karate’s attentions.

But who had hired him? If it had been the Agency, it would have been a violation of one of my three rules: no women or children, no acts against non-principals, no B-teams. Maybe my old friends from the government thought that, because they had managed to track me down in Rio, I was vulnerable, and that they could therefore treat my rules as mere guidelines. If this was indeed their assumption, they were mistaken. I had enforced my rules before, and would do so again.

That afternoon, I made a point of strolling past the gym with Keiko, and, sure enough, there was my friend, earnestly kicking the air at the same time as the day before. Some people just need a routine, and refuse to accept the consequences of predictability. In my experience, these people tend to get culled, often sooner, sometimes later. It’s a Darwinian world out there.

Seeing an opportunity, I checked the sign-in sheet. His name was illegible, but he had written his room number clearly enough: 812. Hmmm, a smoking floor. Unhealthy.

I asked Keiko if she wouldn’t mind shopping by herself for a little while. She smiled and told me she’d be delighted, which was probably the truth. She might have thought I was going off for a taste of the area’s sumptuous buffet of prostitutes. No doubt she assumed I was married-the resulting associated paranoia of which would explain any countersurveillance moves she might have noticed-and I doubted that she would have found the notion of additional philandering excessively shocking.

Watching her walk out the front entrance to catch a cab into town, I felt an odd surge of affection. Most people would think of someone in Keiko’s line of work as being anything but innocent, but at that moment, to me, innocence practically defined her. Her job was to offer me pleasure-and she was doing very well at it-and for her, our presence in Macau was no more complicated than that. She was as oblivious to the deadly dance playing out around her as a sheep grazing in a field. I told myself that she would go home with that innocence intact.

I called 812 from the lobby phone. There was no answer. A good sign, although not proof-positive: someone might have been in the room and not answering the phone, or Karate might have written down an incorrect room number, which I certainly would have done. Still, it was worth a look.

I stopped in my room to pick up a few items I would need, then took the elevator to the seventh floor. From there, I took the stairs, the less trafficked route, and therefore the one less likely to present problems like witnesses. On my left wrist, concealed under the baggy sleeve of a fleece pullover, was a device that looked like a large PDA, secured with Velcro. The device, which saw its initial deployment in the second Gulf War, is called SoldierVision. It takes a radar “picture” of a room through walls and feeds the resulting image back to the wrist unit. Not exactly something you might pick up at your local hardware store, and definitely one of the advantages of working with Christians In Action again.

Earlier in my stay I had taken the trouble of securing a master key for just this sort of occasion, although at the time it was Belghazi I had in mind, not Karate. The hotel used punched-hole mechanical key cards, the kind that look like slightly thickened, plain gray credit cards with patterns of two-millimeter holes cut in them. It also used, as part of its campaign to “Protect Our Environment!”, a system whereby the key had to be inserted into a wall slot next to the door for the room lights to become operable. When you withdrew the key in preparation for leaving the room, there was about a one-minute delay before the lights would go out. The maids carried master keys, of course, and it had been easy enough to walk past a room that was being cleaned, pull the maid’s master from the reader, make an impression in a chunk of modeling clay I’d picked up in a local toy store, and replace the key, all in about six seconds. Using the impression as a template, all I had needed to do was punch the appropriate additional holes in my room key, fill in the inappropriate ones with fast-setting epoxy clay, and presto, I had the same access as the hotel staff.

Karate’s room was on the left of the corridor. I used the SoldierVision to confirm that it was empty, then let myself in with my homemade master. I wasn’t unduly concerned about disturbing the room’s contents in a way that might tell Karate someone had entered in his absence-the daily maid service could account for that.

I walked in and sniffed. Whoever he was, he’d been taking full advantage of his stay on the smoking floor. The room was thick with the lees of strong tobacco-Gauloises or Gitane, something like that-which you can smell outside those Tokyo bistros whose fervently Francophile patrons believe that emissions from a Marlboro or a Mild Seven might ruin the pleasant illusion of an afternoon in a Latin Quarter café.

I pulled on a pair of gloves and did a quick search of the closet and drawers, but found nothing remarkable. The small room safe was closed and locked, probably with his identification and other goodies inside. There was a Dell laptop on the desk, but I didn’t have time to wait for its Windows operating system to boot. Besides, if he had enabled the boot log feature, he would see that someone had fired up the laptop in his absence and would get suspicious.

I picked up the room phone and hit the key for room service. Two rings, then a Filipina-accented voice said, “Yes, Mr. Nuchi, how may I help you?”

“Oh, I think I hit the wrong button. Sorry to disturb you.”

“Not at all, sir. Have a pleasant day.”

I hung up. Mr. Nuchi, then. Who liked French cigarettes.

But no other clues. Nothing even to confirm my suspicion that this guy was a pro, and possibly a rival. Well, there were other ways I might learn more.

I pulled an adhesive-backed transmitter from one of my pockets, peeled off the tape cover, and secured it in a suitably recessed spot along the bottom edge of one of the dressers. The unit was battery-operated and sound-activated. With luck, it would get a good enough feed for me to understand any conversation it picked up. But even short of that, it would help me figure out when Karate was coming and going, and therefore make it easier for me to learn more by following him.

I walked back to the door, used the SoldierVision to confirm that the hallway was clear, and left. The whole thing had taken about four minutes.

BELGHAZI ARRIVED early that evening. I was enjoying a cocktail with Keiko in the lobby, where I had a view of the registration desk, and made him in an instant. He was swarthy, the legacy of an Algerian mother, and his hair, which had been long and unruly in the CIA file photo, was now shaved close to the scalp. I put him at about six feet and a hundred and eighty-five pounds. Dense, muscular build. He was wearing an expensive-looking blue suit, from the cut maybe Brioni or Kiton, and a white shirt open at the collar. In his left hand he gripped the handle of what looked like a computer briefcase, something in black leather, and I caught a flash of gold chain encircling his wrist. But despite the clothes, the accessories, the jewelry, there was no element of fussiness about him. On the contrary: his presence was relaxed, and powerful. He looked like the kind of man who wouldn’t have to raise his voice when speaking to his subordinates, who would command the attention of strangers with only a look or a gesture. Someone who wouldn’t need to threaten violence to get what he wanted, if only because the hint of it would always be there, in the set of his posture, the look in his eyes, the tone of his voice.