Bosch was wearing a blue jumpsuit over his rumpled suit. His sweat had stained through the underarms and back of both layers of clothing. His hair was damp and his mustache drooped. He had been inside the pipe. He could feel the slight, warm tickle of a Santa Ana wind drying the sweat on the back of his neck. They had come early this year.

Harry was not a big man. He stood a few inches short of six feet and was built lean. The newspapers, when they described him, called him wiry. Beneath the jumpsuit his muscles were like nylon cords, strength concealed by economy of size. The gray that flecked his hair was more partial to the left side. His eyes were brown-black and seldom betrayed emotion or intention.

The pipe was located above ground and ran for fifty yards alongside the reservoir’s access road. It was rusted inside and out, and was empty and unused except by those who sought its interior as a shelter or its exterior as a canvas for spray paint. Bosch had had no clue to its purpose until the reservoir caretaker had volunteered the information. The pipe was a mud break. Heavy rain, the caretaker said, could loosen earth and send mud sliding off the hillsides and into the reservoir. The three-foot-wide pipe, left over from some unknown district project or boondoggle, had been placed in a predicted slide area as the reservoir’s first and only defense. The pipe was held in place by half-inch-thick iron rebar that looped over it and was embedded in concrete below.

Bosch had put on the jumpsuit before going into the pipe. The letters LAPD were printed in white across the back. After taking it out of the trunk of his car and stepping into it, he realized it was probably cleaner than the suit he was trying to protect. But he wore it anyway, because he had always worn it. He was a methodical, traditional, superstitious detective.