“He wants us to go thataway,” Mr. Contreras said. “He’s found something, he wants us to go with him.”

I held the thing he’d been dropping under the flashlight. It was some kind of fabric, but so caked in mud, I couldn’t tell what it was.

“You want to follow us in the car while I see where he wants to get to?” I said dubiously. Maybe he’d killed one of the punks and wanted me to see the body. Maybe he’d found Josie, drawn by the scent from the T-shirt he’d been lying on, although this rag was too small to be a shirt.

I found a bottle of water in my car and poured some into an empty paper cup I found in the grass. Mitch was so urgent to get me going west that I persuaded him to drink only with difficulty. I finished the bottle myself, and gave him his head. He insisted on carrying his filthy piece of fabric.

More cars were passing us now, people heading for work in the dreary predawn. I took the flashlight in my right hand so oncoming cars could see us. With Mr. Contreras crawling in our wake, we padded along 100th Street, Mitch looking anxiously from me to the ground in front of him. At Torrence, about half a mile along, he got confused for a few minutes, darting up and down the ditch along the road before deciding to head south.

We turned west again at 103rd, passing in front of the giant By-Smart warehouse. The endless stream of trucks was coming and going, and a dense parade of people was walking up the drive from the bus stop. The morning shift must be starting. The sky had lightened during our march; it was morning now.

I was moving like a lead statue, one numb, heavy foot in front of the other. We were close to the expressway and the traffic was thick, but everything seemed remote to me, the cars and trucks, the dead marsh grasses on either side of us, even the dog. Mitch was a phantom, a black wraith I was dumbly following. Cars honked at Mr. Contreras, inching behind us, but even that couldn’t rouse me from my stupor.

All at once, Mitch gave a short bark and plunged from the side of the road into the swamp. I was so startled that I lost my balance and fell heavily into the cold mud. I lay there dizzily, not wanting to make the effort to get back up, but Mitch nipped at me until I struggled back to my feet. I didn’t try to pick up the leash again.

Mr. Contreras was calling down to me from the road, wanting to know what Mitch was doing.

“I don’t know,” I croaked up at him.

Mr. Contreras shouted out something else, but I shrugged in incomprehension. Mitch was tugging at my sleeve; I turned to see what he wanted. He barked at me and started to cut across the swamp, away from the road.

“Try to follow us overland,” I shouted hoarsely, and waved.

After a minute or two, I couldn’t see Mr. Contreras. The dead grasses with their gray beards closed over my head. The city was as remote as if it were only a dream itself; the only thing I could see was the mud, the marsh rats that skittered at our approach, the birds that took off with anxious cries. The leaden sky made it impossible to guess what direction we were going. We might be heading in circles, we might die here, but I was so tired that the thought couldn’t rouse me to a sense of urgency.

The dog was exhausted, too, which was the only reason I could keep up with him. He stayed a dozen paces ahead of me, his nose to the ground, lifting it only to make sure I was still with him before nosing ahead again. He was following the tracks a truck had laid down in the mud, new tracks made so recently that the plants still lay on their sides.

I wasn’t wearing gloves, and my hands were swollen with cold. I studied them as I stumbled along. They were large purple sausages. It would be so nice to have a fried sausage right now, but I couldn’t eat my fingers, that was silly. I jammed them into my coat pockets. My left hand bumped into the metal thermos. I thought dreamily of the bourbon inside it. It belonged to someone else, it belonged to Morrell, but he wouldn’t mind if I had a little, just to keep me warm. There was a reason I shouldn’t drink it, but I couldn’t think what it was. Was the bourbon poisoned? A demon snatched it from Morrell’s kitchen. He was a funny, heavyset demon with thick, twitching eyebrows, and he carried the thermos to Billy’s car, then stood watching while I found it. A cry under my nose made me jump. I had fallen asleep where I stood, but Mitch’s hot breath and anxious whimper brought me back to the present, the marsh, the dull autumn sky, the meaningless quest.

I slapped my chest, my sausage fingers bunched together inside the coat sleeves. Yes, pain was a good stimulant. My fingers throbbed and that was good; they were keeping me awake. I wasn’t sure I could fire a gun again, but who was I going to shoot in the middle of the swamp?

The grasses thinned, and rusty cans began replacing marsh rats. A real rat moved across the track in front of me. It looked at Mitch as though daring him to fight, but the dog ignored it. He was whining constantly now, worried, and he stepped up the pace, urging me forward with his heavy head when he thought I was lagging.

I didn’t notice when we left the marsh, but suddenly we were picking our way through a dump. Cans, plastic bags, the white lips of six-pack holders, raggedy clothes, car seats, things I didn’t want to recognize, all mashed under-foot by the truck whose tracks we were following. I tripped on a tire, but kept slogging forward.

The refuse sort of ended at a barbed-wire fence, but the truck had been driven straight at the fence, and an eight-foot section had come loose. Mitch was sniffing at a fragment of crimson stuck to the barbs, whining and barking at me. I went to inspect it. It was new, new to the area, I mean, because the color was still so fresh. Every other piece of cloth had turned a dirty gray. I tried to feel it, but my swollen fingers were too cracked to tell anything.

“It looks like silk,” I said to Mitch. “Josie doesn’t wear silk, so what is it, boy?”

He picked his way across the sagging piece of fence, and I went after him. When we were clear of the fence, Mitch started to run. When I didn’t keep up with him, he came back to nip me in the calf. Dehydrated, hungry, frozen, I ran with him across a paved road, up a steep hill, onto a plateau covered in dead grass that was springy and flat underfoot. Maybe I had fallen asleep again, because it was too much like a fairy tale, where you go through the demon-filled woods and come to a magical castle-at least, the grounds to the magical castle.

I had a stitch in my side and black spots dancing in front of my eyes, which I kept confusing with Mitch. Only his hoarse bark kept me going in the right direction, or, at least, the direction he was headed. I was floating now, the turf a yard or more below my feet. I could fly, it was the magic of the fairy castle, one mud-heavy foot leaving the ground, the other leaping behind it, I only had to move my arms a little, and I catapulted headfirst down the hill, rolling over and over until I was almost lying in a lake.

A giant hound appeared, the familiar of the witch whose castle I’d invaded. He grabbed my coat sleeve and tried to pull me along the ground, but he couldn’t move me. He bit my arm and I sat up.

Mitch. Yes, my dog. Leading me on a mission impossible, a mission to nowhere. He bit me again, hard enough to break through my peacoat. I shrieked and pushed myself upright again.

“Jeesh, you a marine sergeant or what?” I croaked at him.

He looked at me balefully: I was the sorriest excuse for a recruit he’d seen in all his years in the corps. He trotted along the edge of the water, stopping briefly for a drink. We went around a bend, and I saw in the distance a small fleet of blue trucks and, in front of me, brown mountains of garbage. The city dump. We were at the city dump? This hound led me through hell to get to the world’s biggest supply of garbage?