The Black Echo

being more than two. But she had been wrong. Just two of everything.
    The tunnel continued on the other side of the camp room, where there was another three-foot-wide hole. Bosch turned the lantern flame off so he wouldn’t be backlit and crawled into the passageway. There were no candles in the walls here. He used the flashlight intermittently, turning it on to get his bearings and then crawling a short distance in the dark. Occasionally, he stopped, held his breath and listened. But the sound of traffic seemed farther away. And he heard nothing else. About fifty feet past the camp room the tunnel reached a dead end, but Bosch saw a circular outline on the floor. It was a plywood circle covered with a layer of dirt. Twenty years earlier he would have called it a rathole. He backed away, crouched down and studied the circle. He saw no indication it was a trap. In fact, he did not expect one. If the tunnelers had rigged the opening, it would have been to guard against entry, not exit. The explosives would be on this side of the circle. Nevertheless, he took his key-chain knife out and carefully ran its edge around the circle, then lifted it up a half inch. He pointed the light into the crack and saw no wires or attachments to the underside of the plywood. He then flipped it up. There were no shots. He crawled to the edge of the hole and saw another tunnel below. He dropped his arm and the flashlight through the hole and flicked on the beam. He swept it around and braced for the inevitable gunfire. Again, none came. He saw that the lower passageway was perfectly round. It was smooth concrete with black algae and a trickle of water at the bottom of its curve. It was a stormwater drainage culvert.
    He dropped through the hole and immediately lost his footing on the slime and slipped onto his back. He propped himself up and with the flashlight began looking for a trail in the black slime. There was no blood, but in the algae there were scrape marks that could have been made with shoes digging for purchase. The trickle of water moved in the same direction as the scrape marks. Bosch went that way.
    By now, he had lost his sense of direction, but he believed that he was heading north. He turned off the beam and moved slowly for twenty feet before flicking it on again. When he did so, he saw that the trail was confirmed. A smeared handprint of blood was at about three o’clock on the curved wall of the pipe. Two feet farther and at five o’clock there was another. Franklin was losing blood and strength quickly, he guessed. He had stopped here to check the wound. He would not be too much farther ahead.
    Slowly, trying to lower the noise of his breathing, Bosch moved forward. The pipe smelled like a wet towel and the air was damp enough to put a film on his skin. The sound of traffic rumbled from somewhere nearby. There was the sound of sirens. He felt the pipe was on a gradual downward slope that kept the trickle of water moving. He was going deeper underground. There were cuts on his knees that bled and stung as he slipped and scraped along the bottom.
    After maybe a hundred feet Bosch stopped and put on the beam, still holding it out to the side of his body and ready with the gun in his other hand. There was more blood on the curving wall ahead. When he switched off the flashlight, he noticed that the darkness changed farther ahead. There was light with a gray-dawn quality to it. He could tell that the pipeline ended, or rather, connected with a passageway where there was dim light. He realized then that he could hear water. A lot of water compared to what was running between his knees. It sounded like there was a river channel up ahead.
    He moved slowly and quietly to the edge of the dim light. The pipeline he crouched in was a porthole on the side of a long hallway. He was in the tributary. Across the floor of the huge hallway, silvery black water moved. It was an underground canal. Looking at it, Bosch could not tell if the water was three inches or three feet deep.
    Squatting at the edge, he first listened for sounds other than lapping water. Hearing nothing, he slowly extended his upper body forward to look down the hallway. The water was flowing to his left. He first looked that way and could see the dim outline of the concrete passageway curving gradually to the right. There was shadowy light filtering down at intervals from holes in the ceiling. He guessed that this light came from drain holes drilled in manholes