'I can find no other cuts, except possibly here.'

He moved the lens closer to an area of the left zygomatic arch, or bone of the cheek. 'Something very faint,' he muttered. 'Too faint to be sure. See it?'

I leaned close to him to look.

'Maybe,' I said. 'Almost like the thread of a spider web.'

'Exactly. It's that faint. And it may be nothing, but interestingly enough, it's positioned at very much the same angle as the other cut. Vertical versus horizontal or slanted.'

'This is getting sick,' Marino said ominously. 'I mean, let's cut to the chase, no pun intended. What are we saying here? That some squirrel cut this lady's throat and then mutilated her face? And then torched the house?'

'I guess that's one possibility,' Vessey said.

'Well, mutilating a face gets personal,' Marino went on. 'Unless you're dealing with a loony tune, you don't find killers mutilating the faces of victims they don't have some sort of connection with.'

'As a rule, this is true,' I agreed. 'In my experience where it hasn't been true is when the assailant is very disorganized and turns out to be psychotic.'

'Whoever burned Sparkes's farm was anything but disorganized, you ask me,' Marino said.

'So you're contemplating that this might be a homicide of a more domestic nature,' Vessey said, now slowly scanning the cranium with the lens.

'We have to contemplate everything,' I said. 'But if nothing else, when I try to imagine Sparkes killing all his horses, I just can't see it.'

'Maybe he had to kill them to get away with murder,' Marino said. 'So people would say what you just did.'

'Alex,' I said, 'whoever did this to her made very sure we would never find a cut mark. And were it not for a glass door falling on top of her, there probably would have been virtually nothing of her left that would have given us any clue as to what happened. If we had recovered no tissue, for example, we wouldn't have known she was dead before the fire because we wouldn't be able to get a CO level. So what happens? She gets signed out as an accidental death, unless we prove arson, which so far we've been unable to do.'

'There's no doubt in my mind that this is a classic case of arson-concealed homicide,' Vessey said.

'Then why the hell hang around to cut on somebody?' Marino said. 'Why not kill her and torch the joint and run like hell? And usually when these whackos mutilate, they get off on people seeing their handiwork. Hell, they display the bodies in a park, on a hillside next to a road, on a jogging trail, in the middle of the living room, right there for all to see.'

'Maybe this person doesn't want us to see,' I said. 'It's very important that we not know he left a signature this time. And I think we need to run as exhaustive a computer search as we can, to see if anything even remotely similar to this has turned up anywhere else.'

'You do that, and you bring in a lot of other people,' Marino said. 'Programmers, analysts, guys who run the computers at the FBI and big police departments like Houston, L.A., and New York. I guarantee you, someone's going to spill the beans and next thing this shit's all over the news.'

'Not necessarily,' I said. 'It depends on who you ask.'

We caught a cab on Constitution and told the driver to head toward the White House and cut over to the six hundred block of Fifteenth Street. I intended to treat Marino to the Old Ebbitt Grill, and at half past five, we did not have to wait in line but got a green velvet booth. I had always found a special pleasure in the restaurant's stained glass, mirrors, and brass gas lamps wavering with flames. Turtles, boars, and antelopes were mounted over the bar, and the bartenders never seemed to slow down no matter the time of day.

A distinguished-looking husband and wife behind us were talking about Kennedy Center tickets and their son's entering Harvard in the fall, while two young men debated whether lunch could go on the expense account. I parked my cardboard box next to me on the seat. Vessey had resealed it with yards of tape.

'I guess we should have asked for a table for three,' Marino said, looking at the box. 'You sure it doesn't stink? What if someone caught a whiff of it in here?'

'It doesn't stink,' I said, opening my menu. 'And I think it would be wise to change the subject so we can eat. The burger here is so good that even I break down now and then and order it.'

'I'm looking at the fish,' he said with great affectation. 'You ever had them here?'

'Go to hell, Marino.'

'All right, you talked me into it, Doc. Burger it is. I wish it were the end of the day so I could have a beer. It's torture to come to a joint like this and not have Jack Black or a tall one in a frosted mug. I bet they make mint juleps. I haven't had one of those since I was dating that girl from Kentucky. Sabrina. Remember her?'

'Maybe if you describe her,' I said absently as I looked around and tried to relax.

'I used to bring her into the FOP. You was in there once with Benton, and I came over and introduced her. She had sort of reddish blond hair, blue eyes, and pretty skin. She used to roller skate competitively?'

I had no earthly idea whom he was talking about.

'Well' - he was still studying the menu - 'it didn't last very long. I don't think she would have given me the time of day if it wasn't for my truck. When she was sitting high in that king cab you would've thought she was waving at everybody from a float in the Rose Bowl parade.'

I started laughing, and the blank expression on his face only made matters worse. I was laughing so hard my eyes were streaming and the waiter paused and decided to come back later. Marino looked annoyed.

'What's wrong with you?' he said.

'I guess I'm just tired,'' I said, gasping. 'And if you want a beer, you go right ahead. It's your day off and I'm driving.'

This improved his mood dramatically, and not much later he was draining his first pint of Samuel Adams while his burger with Swiss and my chicken Caesar salad were served. For a while we ate and drifted in and out of a conversation while people around us talked loudly and nonstop.

'I said, do you want to go away for your birthday?' one businessman was telling another. 'You're used to going wherever you want.'

'My wife's the same way,' the other businessman replied as he chewed. 'Acts like I never take her anywhere. Hell, we go out to dinner almost every week.'

'I saw on Oprah that one out of ten people owe more money than they can pay,' an older woman confided to a companion whose straw hat was hanging from the hat rack by their booth. 'Isn't that wild?'

'Doesn't surprise me in the least. It's like everything else these days.'

'They do have valet parking here,' one of the businessmen said. 'But I usually walk.'

'What about at night?'

'Shooo. Are you kidding? In D.C.? Not unless you got a death wish.'

I excused myself and went downstairs to the ladies' room, which was large and built of pale gray marble. No one else was there, and I helped myself to the handicap stall so I could enjoy plenty of space and wash my hands and face in private. I tried to call Lucy from my portable phone, but the signal seemed to bounce off walls and come right back. So I used a pay phone and was thrilled to find her at home.

'Are you packing?' I asked.

'Can you hear an echo yet?' she said.

'Ummm. Maybe.'

'Well, I can. You ought to see this place.'

'Speaking of that, are you up for visitors?'

'Where are you?' Her tone turned suspicious.

'The Old Ebbitt Grill. At a pay phone downstairs by the restrooms, to be exact. Marino and I were at the Smithsonian this morning, seeing Vessey. I'd like to stop by. Not only to see you, but I have a professional matter to discuss.'

'Sure,' she said. 'We're not going anywhere.'